问题 问答题 简答题

阐明有效积温法则应用的局限性

答案

参考答案:

1一年严格发生1带专性滞育昆虫、多年发生1代的昆虫和具有定向迁飞习性而在本地不能越冬的昆虫,利用有效积温法则推测其年发生代数无意义;

2昆虫栖息场所的小气候温度与气象台测得的大气温度有所差异,所以应用时应尽可能利用小气候温度;3昆虫的不同地理种群的发育起点温度不完全相同;

4在定温和自然变温条件下,昆虫的发育速率不同,变温下昆虫的发育速率较恒温下快;

5温度是影响昆虫发育速率的主要因素,但食料、湿度等其他因素也有一定影响,因而在应用时应注意修正;

6有效积温法则是以温度与发育速率呈直线关系为前提的,而事实上在整个适温区内,其更确切的关系并非直线关系,采用直线关系表示,误差较大。

阅读理解

阅读理解。

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if you are lazy for most of the year and then work hard only a few days before the examination. If you are

taking an English examination, don't learn only rules of grammar.

     Try to read stories in English and speak in English whenever you can. A few days before examination you

should start going to bed early. Do not stay up late at night studying and learning things. Before you start the

examination, read carefully over the examination paper. Try to understand the exact meaning of each question

before you pick up your pen to write. When you have at last finished your examination, read your answers,

correct any mistakes that you see and make sure that you have not missed anything out.

1. How do you know to pass an examination?[ ]

A. Work hard every day in a year.

B. Work hard many days in a year.

C. Work hard most of time in a year.

D. Work hard only a few days before the examination.

2. If you are going to take examination, ______. [ ]

A. study hard and sleep less

B. get up early and do a lot of reading

C. go to bed early and have a good rest

D. go to bed late and get up late

3. What should you do when you are taking the examination? [ ]

A. Pick up your pen and write at once.

B. After you finish the examination, hand in at once.

C. Try to understand every word while you are reading.

D. Go over your paper before you hand it in.

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A. Speak more, listen less, never write.

B. Speak less, write more, never listen.

C. Read more, listen more, speak less.

D. read and speak as much as possible.

5. What does "missed...out" mean according to the passage? [ ]

A. 遗漏

B. 增补

C. 缺乏

D. 丰富

单项选择题 A3/A4型题