问题 问答题 简答题

家用血氧仪应该注意哪些问题?

答案

参考答案:

(1)初次使用家用血氧仪之前,需要仔细查阅血氧仪的使用说明书,了解使用方法及注意事项;

(2)一般家庭中使用的血氧仪产品都是电池供电,使用前注意检查电池是否有电,长期不使用时应按说明书指导及时取出电池;

(3)使用产品后要按说明书的维护、保养方法进行维护。

阅读理解

阅读理解。

     Why do plants grow in some places and not in others? Why does some land have so much growing on it,

while other land has almost no plants growing on it at all.

     To grow, plants need several things. One is warmth. In very cold places almost nothing grows. Plants also

need water. In very dry parts of the Earth only a few unusual plants can grow. That's why dry deserts

everywhere are almost not covered by trees or grass.

     Plants must also have a place in which to put down their roots and grow. They find it difficult to grow on

hard land. The town is built on hard land. The plants here can only grow in the soil between the cracks (缝隙)

of the stones.

     Another thing plants must have before they can grow is food.

     What will happen if we try to make things grow on the sandy beach? A few plants, such as beach grass,

will grow in sand, but most plants won't. Even if the weather is warm enough and we water the plants each

day, many of them will die because the sand on this beach has almost no food for plants.

1. Plants can grow ______. [ ]

A. nowhere

B. somewhere

C. anywhere

D. everywhere

2. The passage tells us that plants need            things to grow. [ ]

A. two

B. three

C. four

D. five

3. Plants like to grow in            soil. [ ]

A. dry

B. hard

C. soft

D. hot

4. From the passage, we can know most of the plants aren't able to grow on the sandy beach

    because ______. [ ]

A. the soil is too poor

B. there is too much water

C. sunshine is not enough

D. sunlight is too strong

5. Maybe the passage can be found in a _____ book. [ ]

A. travel

B. history

C. physics

D. science

单项选择题