问题 单项选择题

导致急性心肌梗死患者早期(24小时内)死亡的主要原因为()

A.心力衰竭

B.心源性休克

C.心律失常

D.心脏破裂

E.肺栓塞

答案

参考答案:C

解析:各种心律失常中以室性心律失常最多见,室颤是急性心肌梗死病人入院前的主要死因

阅读理解

阅读理解。

     Plants are very important. This is because plants can make food from air, water and sunlight. Animals and

man can't make food from air, water and sunlight. Animals can get their food by eating plants and other

animals. Man gets his food by eating plants and animals, too. So animals and man need plants in order to (为了)

live. This is why there are so many plants around us.

     There are two kinds of plants, flowering plants and non-flowering plants. Almost all the trees around us are

flowering plants. You can know some trees from their flowers and fruits. Non-flowering plants do not grow

flowers. You can't see many non-flowering plants around you.

     If you look carefully at the plants around you, you will find that there are many kinds of plants. Some

plants are large and some are small. Most of them are green. Thanks to the plants around us, we can live on

the earth.

1. Why are plants very important?

A. Because we can get food from plants.

B. Because they can give us shade (阴凉).

C. Because plants can make food from air, water and sunlight.

D. Because they are flowers.

2. We need many plants around us because ________.

A. plants can grow easily

B. plants are green

C. we can get what we need from plants

D. we like all kinds of plants

3. What are the two kinds of plants?

A. Flowering plants and fruits.

B. Non-flowering plants and fruits.

C. Threes and vegetables.

D. Flowering plants and non-flowering plants.

4. There are _________ non-flowering plants than flowering plants around us.

A. much fewer

B. much more

C. much larger

D. much better

5. The best title (标题) for this passage is ______.

A. Food from plants

B. Plants Make Food

C. Man and Animals

D. Plants around Us

不定项选择