精品一区二区免费在线观看_国产精品久久久久久av福利软件_97成人精品区在线播放_国内成人精品一区


A pair of twin-brother ligers, a rare lion-tiger hybrid(雜種), have become superstars in China's southernmost island province of Hainan after becoming the first ligers in the country to reach their first birthday.
Tens of thousands of tourists visited the liger brothers at Hainan Tropical Wildlife Park during the week-long May Day holiday that ended on Sunday, hoping to catch a glimpse of the rare animals. At least 10,000 people signed a red banner when the park celebrated the liger's birthday on May 2. People expressed the hope that the twins would be strong and healthy, the Hainan Daily reports. Zookeepers even made the twins a special birthday cake out of beef and eggs.
The ligers, born on May 2, 2005 , are named 'Ping Ping' and 'An An', which together translate as 'safe and sound'. Their mother Huan Huan is a six-year-old tigress and their father is a four-year – old lion named Xiao Erhei.  The couple first gave birth to a liger in June 2004 but the cub (幼獸)  died of respiratory(呼吸的)failure 72 hours later.
The pregnancy (懷孕) rate for lion-tiger couples is only between one and two percent and the cubs normally have a short life expectancy due to the differences in their chromosomes(染色體). Zoologists say only six to eight ligers are living in the world. China's first tiger-lion hybrid cub was born at Hongshan Zoo in Nanjing, capital of east China's Jiangsu Province, in 2002. But it died a week later.
Ping Ping and An An have broken the survival record set by a liger who lived for 113 days at Hongshan Zoo.
1. Why can Ping Ping and An An become superstars?
A. Because they are the most beautiful ligers.
B. Because they are the cleverest ligers.
C. Because they are the most attractive ligers.
D. Because they are the first ligers to live for a year.
2. Why can't ligers live long ?
A. Because their chromosomes are different.
B. Because they are too small when they are born.
C. Because their parents don't live long.
D. Because they are short of food.
3. How many ligers did the passage mention?
A. Three.         B. Four.          C. Five.         D. Six.
4. What is the best title of this passage?
A. China's longest living twin ligers celebrate their lst birthday
B. Why can't ligers in the world live long
C. How to raise ligers safely
D. The story behind the ligers


【小題1】D
【小題2】A
【小題3】C
【小題4】A

解析

練習冊系列答案
相關(guān)習題

科目:高中英語 來源:2010年上海市虹口區(qū)高三下學期質(zhì)量監(jiān)控考試(英語) 題型:閱讀理解

Birds that are half-asleep—with one brain hemisphere (半球) alert and the other sleeping—control which side of the brain remains awake, according to a new study of sleeping ducks.
Earlier studies have documented half-brain sleep in a wide range of birds. The brain hemispheres take turns sinking into the sleep stage characterized by slow brain waves. The eye controlled by the sleeping hemisphere keeps shut, while the wakeful hemisphere’s eye stays open and alert. Birds also can sleep with both hemispheres resting at once.
Decades of studies of bird groups led researchers to predict extra alertness in the end-of-the-row sleepers which tend to be attacked more easily. Sure enough, the end birds tended to watch carefully on the side away from their companions. Ducks in the inner spots showed no preference for gaze direction.
Also, birds napping at the end of the line depend on single-hemisphere sleep, rather than total relaxation, more often than inner ducks did. Turning 16 birds through the positions in a four-duck row, the researchers found that compared with 12 percent for birds in internal spots, outer birds half-asleep during some 32 percent of napping time.
“We believe this is the first evidence for an animal behaviorally controlling sleep and wakefulness at the same time in different regions of the brain,” the researchers say.
The results provide the best evidence for a long-standing assumption that single-hemisphere sleep evolved as creatures scanned for enemies. The preference for opening an eye on the lookout side could be widespread, he predicts. He’s seen it in a pair of birds napping side-by-side in the zoo and in a single pet bird sleeping by a mirror. The mirror-side eye closed as if the reflection were a companion and the other eye stayed open.
Useful as half-sleeping might be, it’s only been found in birds and such water animals as dolphins, whales, and seals. Perhaps keeping one side of the brain awake allows a sleeping animal to surface occasionally to avoid drowning.
Studies of birds may offer unique insights into sleep. Jerome M. Siegel of the UCLA says he wonders if birds’ half-brain sleep “is just the tip of the iceberg.” He supposes that more examples may turn up when we take a closer look at other species.
72. According to the passage, birds often half sleep because ______.
A. they have to watch out for possible attacks
B. their brain hemispheres take turns to rest
C. the two halves of their brain are differently structured
D. they have to constantly keep an eye on their companions
73. What is implied about the example of a bird’s sleeping in front of a mirror?
A. An imagined companion gives the bird a sense of security.
B. Birds prefer to sleep in pairs for the sake of their security.
C. The phenomenon of birds napping in pairs is widespread.
D. A single pet bird enjoys seeing its own reflection in the mirror.
74. While sleeping, some water animals tend to keep half awake in order to ______.
A. alert themselves to the approaching enemy
B. emerge from water now and then to breathe
C. be sensitive to the ever-changing environment
D. avoid being swept away by rapid currents
75. By saying “just the tip of the iceberg”, Siegel suggests that ______.
A. half-brain sleep has something to do with icy weather
B. the mystery of half-brain sleep is close to being solved
C. most birds living in cold regions tend to be half sleepers
D. half-brain sleep may exist among other species

查看答案和解析>>

科目:高中英語 來源:2016屆河北省高一上學期期中考試英語試卷(解析版) 題型:閱讀理解

Trip 1  Black Bear Count

  There have been fires in this area in the last few years and the Office of the National Park is not sure how many black bears are still living. Some bears have been seen since the fires, and the Office has asked for young people to help count them.

  The entire trip will last three hours. Bookings necessary.

Cost: Free                 When: May 8

Trip 2  Garland Valley

  Bring your drink and lunch for this walk in a beautiful area of the Blue Mountains. Garland Valley is close to the town of Garland but is part of the National Park. Many wild animals live in this area, including many rare birds. This is a great walk for bird-lovers. The trip lasts four hours. Bookings necessary.

Cost: $ 15                 When: May 8, May 15

Trip 3  Flashlight Adventure

  Put on your warm clothes, bring a flashlight and a pair of glasses, and come for a night walk along the Dungog Valley. A guide will lead the tour. Many of the animals you will see on this trip can only be seen at night. The guide will tell you about the lives of the animals you see. Numbers are strictly limited on night trips, so be sure to book early. This walk lasts two and a half hours.

Cost: $ 12               When: May 8, May 15, May 22

Equipment to be needed:

·   Please bring enough water and food for all walks.

·   Wear good walking shoes--no high heels.

·   Wear a hat for day walks.

·   Dress warmly for night walks.

·   Children must be with an adult.

·   Make sure your flashlight works well and bring extra batteries for night walks.

·   Follow all instructions from guides during the walks. The mountains are a dangerous place.

Bookings:

   Bookings for the above trips can be done by telephone (893 - 4847) or on the Internet at (www. Bluemountaintour.com)

1.Where are these trips?

A. In a large city.                                    B. In a park in the mountains.

C. In a special zoo.                                   D. In three different countries.

2.Which of the following is NOT necessary for the three trips?

A.A sleeping bag.                                   B. A pair of glasses.

C. Food and water.                                  D. Good walking shoes. 

3.What is the best title for the passage?

A. Adventure Travel in America

B. Hunting around the Great Mountains

C. Discovery Trips in the Blue Mountains

D. Interesting Trips in the East of the USA

 

查看答案和解析>>

科目:高中英語 來源:2014屆河北石家莊無極中學高三上學期第一次月考英語卷(解析版) 題型:閱讀理解

At night, bats fly through the air, catching hundreds of insects and other small animals. But during the day, they hardly move at all. Instead, bats pass the time hanging upside down from a secret spot.

There are a couple of reasons why bats rest this way. First of all, it puts them in a position for takeoff. Unlike birds, bats can’t fly into the air from the ground. Their wings don’t produce enough lift to take off from a dead stop, and their hind legs are so small and underdeveloped that they can’t run to build up the necessary takeoff speed. Instead, they use their front claws to climb to a high spot, and then fall into flight.

During the hours when most enemies are active, bats gather where few animals would think to look and most can’t reach. This allows them to disappear from the world until night comes again. There’s also little competition for these resting spots, as other flying animals don’t have the ability to hang upside down. Bats have a unique physiological adaptation that lets them hang around this way without using any energy. For you to hold your fist around an object tight, you contract(緊縮) several muscles in your arm, which are connected to your fingers by tendons(腱);as one muscle contracts, it pulls a tendon, which pulls one of your fingers closed. A bat’s talons(爪) close in the same way, except that their tendons are connected only to the upper body, not to a muscle. To hang upside down, a bat pulls its claws open with other muscles. To get the talons to take hold of the surface, the bat simply lets its body relax. The weight of the upper body pulls down on the tendons connected to the talons, causing them to hold tight. Therefore, the bat doesn’t have to do anything to hang upside down.

1.Bats hang upside down because________.

A. they haven’t developed a pair of strong claws

B. they can’t start to fly from the ground directly

C. they have no hind legs to support their body

D. they can’t find quiet places to stay during the day

2.The third paragraph tells us that bats’ hanging upside down_______.

A. is to save their energy for night movement

B. is a way to fight against flying animals

C. is a great way to hide from danger

D. is a skill to compete for the flying places

3.Why can bats hang upside down easily?

A. Because their upper body is light.

B. Because they have strong muscles.

C. Because their talons are linked to muscles tightly.

D. Because their tendons are linked to their upper body.

4.What is the passage mainly about?

A. The living habits of bats.

B. How and why bats hang upside down.

C. The importance of bats’ hanging upside down.

D. How bats use their energy at night.

 

查看答案和解析>>

科目:高中英語 來源:2014屆浙江省臺州市高二下學期第一次月考英語試卷(解析版) 題型:閱讀理解

Harry is eighteen now. He studies in a middle school. His parents like him very much and hope he can become a famous man. So they often tell him to study hard and they do all for him. They call him at six in the morning, after breakfast his father takes him to school in a car and in the afternoon, as soon as the young man comes back, the supper is ready. Of course, he never washes his clothes or goes to buy something in the shops.

   Once, Harry’s father was sent to London on business. He would stay there for half a year. Leaving, he told his wife to take good care of their son. The woman had to get up earlier and did all what her husband did before. And two months later she was so tired that she was ill in bed. Now the young man got into trouble. He couldn’t do any housework. He had to do as his mother told him. Even he didn’t know where to get on the bus!

   Yesterday Harry’s mother found his shoes were worn out and told him to buy a new pair in the shop. But he didn’t know how to choose. The woman had a sigh(嘆息) and gave him a shoe pattern(鞋樣) and told him to buy a pair of shoes himself. It’s Saturday today and Harry doesn’t go to school. With a policeman’s help, he found a shop. The shopkeeper was friendly to him. The man brought a lot of shoes and asked him to choose. When he was trying on a pair, suddenly he remembered something and took them off. The man was surprised and asked, “What’s the matter, young man?”

 “I’m sorry, I’ve left the shoe pattern at home!”

1. _______ always does some housework in the morning.

A.Harry’s father     B.Harry’s mother    C.Harry             D.Nobody

2.Harry’s parents do all instead of him because _______.

A.he’s too young

B.he has poor health

C.he’s busy with his studies

D.they hope he spends all time on studies

3.The woman had to look after her son by herself because _______.

A.her husband wasn’t at home

B.she was stronger than her husband

C.she knew the young man well

D.she was freer than her husband

4. The woman told her son to buy a pair of shoes because _______.

A.she didn’t know what kind he needed

B.she was busy with the housework

C.something was wrong with her

D.she wanted her son to do something himself

5. In fact, _______.

A.Harry wanted his mother to buy shoes for him

B.Harry didn’t believe in himself

C.Harry wouldn’t listen to his mother

D.Harry was strong enough to buy shoes for himself

 

查看答案和解析>>

科目:高中英語 來源:2014屆山西省晉中市高二下學期期中考試英語試卷(解析版) 題型:閱讀理解

Welcome to one of the largest collections of footwear (鞋類) in the world that will make you green with envy. Here at the Footwear Museum you can see exhibits (展品) from all over the world. You can find out about shoes worn by everyone from the Ancient Egyptians to pop stars.

Room 1

The celebrity (名人) footwear section is probably the most popular in the entire museum. Stared in the 1950s there is a wide variety of shoes and boots belonging to everyone from queens and presidents to pop stars and actors! Most visitors find the celebrities’ choice of footwear extremely interesting.

Room 2

Most of our visitors are amazed and shocked by the collection of “special purpose” shoes on exhibition here at the Museum of Footwear. For example, there are Chinese shoes made of Silk that were worn by women to tie their feet firmly to prevent them from growing too much!

Room 3

As well as shoes and boots, the museum also exhibits shoe shaped objects. The variety is unbelievable. For example, there is a metal lamp that resembles a pair of shoes, and Greek wine bottles that look like legs!

The Footwear Library

People come from all over the world to study in our excellent footwear library. Designers and researchers come here to look up information on anything and everything related to the subject of footwear.

1. Where would you find a famous singer’s shoes?

A.Room 1.                              B.Room 2.

C.Room 3.                              D.The Footwear Library.

2.All exhibits in each room _____.

A.share the same theme

B.have the same shape

C.a(chǎn)re made of the same material

D.belong to the same social class

3.Which of the following is true according to the text?

A.Room 2 is the most visited place in the museum.

B.Researchers come to the Footwear Library for data.

C.The oldest exhibits in Room 1 were made in the 1950s.

D.Room 3 has a richer variety of exhibits than the other two.

4. The purpose of the text is to get more people to _____.

A.do research                           B.design shoes

C.visit the museum                        D.follow celebrities

 

查看答案和解析>>

同步練習冊答案
精品一区二区免费在线观看_国产精品久久久久久av福利软件_97成人精品区在线播放_国内成人精品一区
精品在线免费观看| 欧美精品自拍偷拍动漫精品| 亚洲欧洲在线观看av| av综合在线播放| 亚洲免费看黄网站| 欧美日韩精品一区视频| 日本最新不卡在线| 精品美女一区二区| 高清在线成人网| 亚洲视频在线一区观看| 在线亚洲人成电影网站色www| 亚洲国产成人精品视频| 欧美一区二区三区在线看| 激情综合色丁香一区二区| 国产精品素人一区二区| 色伊人久久综合中文字幕| 日韩专区一卡二卡| 久久综合九色欧美综合狠狠| a亚洲天堂av| 午夜精品成人在线| 国产亚洲人成网站| 色猫猫国产区一区二在线视频| 视频一区欧美精品| 国产午夜精品一区二区| 91污在线观看| 日本不卡一区二区三区| 久久久欧美精品sm网站| 97超碰欧美中文字幕| 偷偷要91色婷婷| 国产婷婷一区二区| 欧美性生活大片视频| 久久av中文字幕片| 综合色中文字幕| 91精品国产黑色紧身裤美女| 大白屁股一区二区视频| 亚洲国产视频网站| 精品国产成人系列| 色噜噜狠狠色综合中国| 久久国产福利国产秒拍| 亚洲视频1区2区| 日韩午夜在线影院| 91尤物视频在线观看| 欧美aaaaaa午夜精品| 国产精品传媒视频| 欧美一激情一区二区三区| 成人激情动漫在线观看| 青青草国产精品97视觉盛宴| 国产精品久久久久aaaa樱花| 在线电影欧美成精品| 不卡影院免费观看| 奇米在线7777在线精品| 日韩一区在线播放| 精品国产乱码久久久久久夜甘婷婷 | 91久久香蕉国产日韩欧美9色| 九九精品一区二区| 亚洲小少妇裸体bbw| 国产三级久久久| 欧美一区二区三区公司| 91尤物视频在线观看| 国产一区二区三区在线看麻豆| 亚洲综合丁香婷婷六月香| 日本一区二区三区免费乱视频| 欧美嫩在线观看| 91亚洲国产成人精品一区二三 | 久久久夜色精品亚洲| 欧美日韩一级片在线观看| 国产成人精品在线看| 免费成人在线网站| 亚洲男女一区二区三区| 久久久久青草大香线综合精品| 欧美乱熟臀69xxxxxx| 91蜜桃传媒精品久久久一区二区| 国产一区三区三区| 日本伊人午夜精品| 一区二区三区日韩欧美| 国产精品久久午夜| 久久久久久久久久久电影| 91精品欧美福利在线观看| 欧美综合一区二区三区| 99久久免费视频.com| 国产一区二区三区日韩 | 97久久精品人人做人人爽50路| 国产在线观看一区二区| 奇米精品一区二区三区在线观看一| 亚洲自拍偷拍欧美| 亚洲欧洲日韩女同| 国产精品私人影院| 久久精品男人的天堂| 精品国产一二三区| 欧美一级理论性理论a| 欧美日韩精品一区二区在线播放| 色婷婷久久99综合精品jk白丝| 国产999精品久久久久久绿帽| 狠狠色综合日日| 久久99最新地址| 日本成人在线网站| 日韩av网站在线观看| 五月天网站亚洲| 亚洲高清免费视频| 亚洲成人福利片| 亚洲妇女屁股眼交7| 一区二区三区不卡视频| 一区二区三区欧美在线观看| 亚洲免费观看高清完整版在线观看| 国产精品传媒视频| 亚洲欧美中日韩| 亚洲欧美日韩国产另类专区| 亚洲色图欧洲色图| 亚洲精品成人天堂一二三| 亚洲天堂网中文字| 亚洲免费资源在线播放| 亚洲精品少妇30p| 亚洲一二三四区| 午夜伊人狠狠久久| 日韩电影在线看| 麻豆精品久久精品色综合| 开心九九激情九九欧美日韩精美视频电影 | 亚洲欧洲制服丝袜| 一区二区三区在线观看欧美| 一区二区三区不卡在线观看| 亚洲一区电影777| 日韩电影在线观看电影| 美腿丝袜亚洲色图| 狠狠色丁香婷综合久久| 国产自产高清不卡| 国产精品88888| 北岛玲一区二区三区四区| 91无套直看片红桃| 欧美性xxxxxxxx| 69堂国产成人免费视频| 精品久久人人做人人爱| 国产午夜精品福利| 专区另类欧美日韩| 亚洲国产一区二区三区| 美腿丝袜亚洲色图| 国产精品一区不卡| 99久久免费精品高清特色大片| 在线看不卡av| 欧美一级在线观看| 久久久精品黄色| 一区在线中文字幕| 天堂久久一区二区三区| 精品一区在线看| av一区二区三区四区| 欧美手机在线视频| 欧美大片在线观看一区二区| 国产午夜精品久久久久久免费视 | 日韩精品一区在线| 中文字幕国产一区| 亚洲国产精品视频| 激情小说欧美图片| 95精品视频在线| 91.xcao| 国产午夜精品一区二区三区四区| 亚洲靠逼com| 蜜桃视频在线一区| 成人app下载| 制服丝袜国产精品| 国产精品女人毛片| 视频一区二区三区在线| 国产成人精品综合在线观看| 欧美亚洲一区二区三区四区| 精品国产凹凸成av人网站| 亚洲欧美日韩成人高清在线一区| 欧美aaaaa成人免费观看视频| 成人蜜臀av电影| 欧美精品乱码久久久久久| 日本一区二区三区久久久久久久久不 | 欧美日韩三级视频| 国产欧美日韩另类一区| 亚洲国产精品久久一线不卡| 国产精品一级在线| 精品视频在线看| 国产欧美日韩久久| 日韩黄色免费电影| 成人av电影免费观看| 欧美一区二区久久| 亚洲柠檬福利资源导航| 黄色日韩网站视频| 欧美亚一区二区| 国产片一区二区三区| 日韩影视精彩在线| 91亚洲国产成人精品一区二三| 日韩欧美亚洲国产精品字幕久久久| 国产精品久99| 黄色小说综合网站| 欧美色大人视频| 中文字幕视频一区二区三区久| 久久精品国产一区二区三| 欧美亚洲日本一区| 国产精品久久毛片av大全日韩| 美女mm1313爽爽久久久蜜臀| 色94色欧美sute亚洲线路二| 国产午夜一区二区三区| 日本伊人色综合网| 在线免费观看视频一区| 国产精品天美传媒沈樵| 九九**精品视频免费播放| 欧美日韩精品三区| 亚洲精品videosex极品|