日日人人_亚洲美女在线视频_av手机在线播放_国产大片aaa_欧美中文日韩_午夜理伦三级

精英家教網 > 高中英語 > 題目詳情

A ship in harbor is safe, but that’s not ______ ships are built for.

A. what B. whom

C. why D. when

練習冊系列答案
相關習題

科目:高中英語 來源:2017屆湖南省高三上學期第一階段考試英語試卷(解析版) 題型:閱讀理解

閱讀下列短文,從每題所給的四個選項(A、B、C和D)中,選出最佳選項。

Very mobile ears help many animals direct their attention to the rustle of a possible attacker. Researchers say these mobile ears have become a useful communication tool. Their studies of animal behaviour build up a picture of how communication and social skills developed.

“We're interested in how they communicate,” said lead researcher Jennifer Wathan.“And being sensitive to what another individual is thinking is a fundamental skill from which other more complex skills develop.”

Ms Wathan and her colleague Prof Karen McComb set up a behavioural experiment where 72 individual horses had to use visual clues from another horse in order to choose where to feed. They led each horse to a point where it had to select one of two buckets. On a wall behind this decision-making spot was a life-sized photograph of a horse's head facing either to left or right. In some of the trials, the horses’ ears or eyes were covered.

If the ears and eyes of the horse in the picture were visible, the horses being tested would choose the bucket towards which its gaze and its ears were directed. If the horse in the picture had either its eyes or its ears covered, the horse being tested would just choose a feed bucket at random.

Like many mammals that are hunted by predators(捕食者), horses can rotate(旋轉)their ears through almost 180 degrees - but Ms Wathan said that in our "human-centric" view of the world, we had overlooked the importance of these very mobile ears in animal communication.

"It seems there's something in the visual clues----from both the eyes and the ears-----that are really important," she told BBC News. "Horses have quite rich social lives and relationships with other horses, so they're a good species to look at this in." And the more we look at communication across different species, the more we can consider what might have promoted the evolution of sophisticated communication and social skills."

1.Why does a horse rotate its ears?

A. To tell each other where they can go for the buckets.

B. To be curious about what the other horse is thinking.

C. To warn the other horse when an attacker is coming closer.

D. To express its hope to build up social relations with others.

2.Why did the researchers use the life-sized photograph of a horse in the experiment?

A. To help develop horses’ complex skills.

B. To lead other horses to feed themselves.

C. To make the horses in the experiment excited.

D. To provide clues for the horses in the experiment.

3.Why are ears and eyes important to horses?

A. They can find the feeding buckets more easily with ears and eyes.

B. With ears and eyes they can escape from dangers more easily.

C. With ears and eyes they can communicate with other horses.

D. Horses have quite rich social lives with ears and eyes.

4.What can be the best title of the passage?

A. Rotary Ears Serve as Communication Tools.

B. Horses Have More Social Skills than Other Species.

C. Experiments with Horses’ Ears.

D. Fundamental Skills of Horses.

查看答案和解析>>

科目:高中英語 來源:2016年高考一輪復習新人教版必修2 特殊句式練習英語試卷(解析版) 題型:單項填空

Not until _________________ the better qualities in ourselves ____________ expect to find them in others.

A. have we developed; can we

B. we have developed; that can we

C. we have developed; can we

D. can we develop; that we will

查看答案和解析>>

科目:高中英語 來源:2016年高考一輪復習新人教版必修1名詞性從句(2)練習英語試卷(解析版) 題型:單項填空

Facebook is a place where you can share _________is going on in your life with friends.

A. how B. whether

C. who D. what

查看答案和解析>>

科目:高中英語 來源:2016年高考一輪復習新人教版必修1名詞性從句(2)練習英語試卷(解析版) 題型:單項填空

--- Is it true that Mike refused an offer from Yale University yesterday?

--- Yeah, but I have no idea _______ he did it; that’s one of his favorite universities.

A. when B. why

C. that D. how

查看答案和解析>>

科目:高中英語 來源:2016年高考一輪復習新人教版必修1名詞性從句(1)練習英語試卷(解析版) 題型:單項填空

Sorry I’m so late, but you cannot imagine _______ great trouble I took to find your house.

A. what B.how

C.which D.why

查看答案和解析>>

科目:高中英語 來源:2016年高考一輪復習新人教版必修1名詞性從句(1)練習英語試卷(解析版) 題型:單項填空

Liu Xiang’s breaking the world record was an exciting moment, ______ all of us will never

forget.

A. that B. One

C. it D. what

查看答案和解析>>

科目:高中英語 來源:2016年高考一輪復習新人教版必修3狀語從句練習英語試卷(解析版) 題型:單項填空

_____ he once felt like giving up, he now has the determination to push further and keep on going.

A. Where B. As

C. In case D. Now that

查看答案和解析>>

科目:高中英語 來源:2016年高考一輪復習新人教版必修3 動詞時態語態(1)練習英語試卷(解析版) 題型:單項填空

—Is Peter coming?

—No, he____ his mind after a phone call at the last minute.

A. changes B. changed

C. was changing D. had changed

查看答案和解析>>

同步練習冊答案
主站蜘蛛池模板: 国产91网 | 亚洲乱码一区二区三区在线观看 | 亚洲国产精品99久久久久久久久 | 精品一区国产 | 99久久日韩精品视频免费在线观看 | 久久精品一区二区 | 亚洲欧美日韩电影 | 日韩 国产 欧美 | 天堂精品| 99久久久久久| 精品成人| 久久综合狠狠综合久久 | 亚洲欧美电影 | 夜晚福利| 中文一区二区 | 日韩亚洲欧美一区二区 | 久久免费精品 | av一区二区三区在线观看 | 久草高清| 日本久久精品一区 | 久久久在线 | 国产成人亚洲综合 | 风间由美一区二区三区在线观看 | 爱爱视频网站 | 国产精品视频免费观看 | 成人午夜天 | 黄色手机在线观看 | 国产精品久久久久久久久久久久久久久久 | 日韩日韩日韩日韩日韩日韩日韩 | 精品在线一区二区 | 不卡视频一区 | 亚洲成人中文字幕 | 久久99精品久久久久久秒播放器 | 你懂的在线视频播放 | 羞羞网站免费观看 | 国产精品美女一区二区三区 | 亚洲二区在线 | 七龙珠z普通话国语版在线观看 | 日韩伦理一区二区 | 亚洲精品在线看 | 日韩电影免费在线观看中文字幕 |