题干

近年来,罗汉松逐成为市道路绿化的笼。在移栽罗汉松的过程中,为了提高存活率,常采取如图所示的搭棚措施,其主要目的是(    )

A:减弱光合作用

B:抑制呼吸作用

C:降低蒸腾作用

D:预防虫害侵袭

上一题 下一题 0.0难度 选择题 更新时间:2017-04-28 03:32:37

答案(点此获取答案解析)

C

同类题5

阅读下面短文,并根据所读内容,在空格里填入一个最适当的词。

    We often see top students around us and everyone knows about them. Let us take Jenny as an example. She is the monitor of our class. She spends a lot of time working for our class. But she always gets good grades in all subjects. How do students like Jenny do that? When I asked her, she said, "Hard work is not the whole story. It's not how long you sit at the desk with your books open. It's what you do as you are sitting." In fact, we can see many top students spend fewer hours on their studies than their classmates. Jenny gave me some valuable suggestions.

    If your math teacher gives you five exercises, you should do six. If your Chinese teacher gives eight pages of reading, you should read nine. The more you practice, the more you learn.

    Studying is a matter of your personal interest, so choose the way you are most comfortable with. Some people like working at night when the house is quiet, while others like doing their work early in the morning. However, others like studying as soon asthey arrive home from school while the work is fresh in their minds. No matter(无论) which way suits you, try to do your best.

    Studying is your business and the business comes before entertainment(娱乐). When you are studying, phone calls should go unanswered, TV shows unwatched, snacks given up. Studying is the only thing in your mind. Nothing can pull your attention away from what you are studying.

    Studying is like eating. You should eat a little at a time. You can plan what to do today, but don't do too much. When you can't finish the work you planned to do, you will feel stressed and may lose confidence. On the other hand, you will not study well without a good plan. It all depends on how you manage your time.

    The students who hand in a clearly written paper are already half way to get an A. Tidy papers are likely to get higher marks than messy(乱糟糟的) ones. When you write clearly and do your work carefully, the thoughts in your mind are clear. You are able to make fewer mistakes.

____ on making your studies better

Passage outline

Supporting details

Do more than you are asked

Do more than what your teacher asks you to because ____ makes you learn more.

Choose suitable ways

Some people like working on a ____ night, while others like doing their work early in the morning. Some people like studying their lessons shortly after ____ home from school.

Put studying____entertainment

Pay ____ to what you are studying.

Plan your time well

Don't try to do much at a time.

Failing to finish your planned task will make you feel stressed and become less ____.

On the other hand, you will not study well without a good plan.

Keep your papers____

Messy papers are more likely to get ____ marks than clearly written ones.

Besides, some mistakes can be ____.