题目内容

【题目】下列现象能用“沧海桑田”这个成语说明的是(

A. 日月星辰的东升西落

B. 喜马拉雅山有海洋生物化石

C. 春夏秋冬的四季变化

D. 海岛涨潮被淹没,退潮露出

【答案】B

【解析】日月星辰的东升西落使由于地球自转造成的;春夏秋冬的四季变化是地球的公转造成的;海陆变迁是类似于沧海桑田的变化,喜马拉雅山有海洋生物化石,说明几千万年前这里曾是一片汪洋大海,后来由于地壳运动,海底逐渐隆起、抬升,才成为今天雄伟高俊的山脉,故答案选B。

练习册系列答案
相关题目

【题目】

The koala

Appearance:

Size: 70—90cm Weight: 5—14kg

The koala with thick hair looks cute but it has very sharp

teeth and claws (爪子).

The male koala is larger than the female one.

Food: The koala eats eucalyptus leaves (桉树叶). Each koala

eats about 500 grams of leaves per day.

Habit: The koala sleeps for up to 16—18 hours. It prefers to move around in the evening.

Baby fact: A healthy female koala can have one child each year. A baby koala is very small when it is born—only a quarter of an inch. It has no hair and it can’t see either. It lives in its mother’s pouch (育儿袋) for half a year. During this time, it only drinks its mother’s milk.

Danger: The number of koalas in Australia is getting smaller every year, mainly because of people. People cut down a lot of trees, so many koalas have no places to live in and they don’t have enough leaves to eat. There are fewer than 100,000 koalas in the world. Some scientists say if people don’t protect them, we won’t have any koalas within 30 years.

1When does the koala often move around during a day?

A. In the morning. B. In the evening.

C. In the afternoon. D. At weekends.

2If someone sees a newly born koala, he will find that ___________________.

A. it can see everything B. it is really small

C. it has thick hair D. it is very big

3A baby koala can’t live without ____________________.

A. water B. grass C. milk D. meat

4Which of the following is TRUE?

A. An adult koala often weighs more than 16kg.

B. The female koala is smaller than the male one.

C. The claws of the koala are sharp but their teeth are not.

D. The koala often sleeps more than 20 hours.

5The koala is in danger now. The main reason is that __________________.

A. big animals eat them

B. people hunt them for their fur

C. people cut down many trees

D. They often kill each other

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网