[题目]有人预言:几千年后.红海将扩大.地中海将消失.试用大陆漂移和板块运动的学说来解释这种现象. 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】有人预言：几千年后，红海将扩大，地中海将消失。试用大陆漂移和板块运动的学说来解释这种现象。

【答案】由于亚欧板块、印度洋板块和非洲板块都在不断地运动，使得亚洲和非洲的之间距离在不断扩大，欧洲和非洲的距离在不断地缩小。因此，红海在不断扩张，将会成为新的大洋；地中海在不断缩小，将会逐渐消失。

【解析】整体分析：该题以所学的知识大陆漂移和板块运动的学说的观点为切入点，考查的是运用大陆漂移和板块运动的学说来解释现象，要求学生会运用。

由于亚欧板块、印度洋板块和非洲板块都在不断地运动，使得亚洲和非洲的之间距离在不断扩大，欧洲和非洲的距离在不断地缩小。因此，红海在不断扩张，将会成为新的大洋；地中海在不断缩小，将会逐渐消失。

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【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.

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

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

C. In the afternoon. D. At weekends.

【2】If 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

【3】A baby koala can’t live without ____________________.

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

【4】Which 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.