问题 探究题

“大树底下好乘凉”,这是一个众人皆知的俗语。通过物理学科的有关知识的学习,两同学发生了分歧:甲同学认为,打遮阳伞与在大树底下一样凉爽,因为都没有受到阳光的直射,起到了遮阳的效果;而乙同学却认为,遮阳伞下比大树底下炎热,这是人们的经验.

(1)你支持谁的观点?支持的理由是什么?

(2)请你帮助他们设计一个实验,来解决他们之间的争辩.(要求写出实验器材和实验方法)

答案

(1)支持乙的观点。理由:树叶的蒸腾作用,水不断蒸发变成水蒸气,吸热,故树底下凉爽.

(2)

A.实验器材:两支相同的温度计、遮阳伞、有浓密树荫的大树

B.实验方法:晴朗天气,分别测出大树下和遮阳伞下的温度,进行比较就可得出结论.

阅读理解

阅读理解。

     Asking for information or help is a very common and necessary activity, especially when we visit a

foreign country. So knowing how to ask for information politely is important. In English, "Where are the

restrooms?" and "Could you please tell me where the restrooms are?" are similar requests-both are correct

English, but the first could sound rude. It's important to use correct language, but sometimes this alone is

not enough-we need to learn how to be polite when we make requests.

     In English, just like in Chinese, we change the way we speak when talking with different people. The

expressions you use might depend on whom you are speaking to or how well you know them. If you say

to your teacher, "Where is my book?" this will sound rude. But if you say, "Excuse me, Mr West. Do you

know where my book is?" your question will sound much more polite. On the other hand, it might be alright

to say "Where is my book?" in some situations, perhaps with people you know well.

     And you would not usually say, "Peter, lend me your pen." A very direct order like this can sound rude

in English. Usually in English polite questions are longer and include extra language, such as "Could you

please...?" or "Can I ask...?" It sounds more polite to say, "Peter, could you please lend me your pen?"

Sometimes we might even need to spend some time leading in to a question or request. For example, if you

stop a stranger in the street, we might first say, "Excuse me. I wonder if you can help me." or "I'm sorry

to trouble you but," before asking them for help.

     It might seem that speaking politely is more difficult than being direct, and in a way this may be true.

However, in order not to offend people, learning about the language etiquette is just as important as learning

grammar or vocabulary. And doing this will also help you become better at English, or any other language

you wish to speak.

1. It's important to know how to ______ in English when we visit a foreign country.

2. When you talk with different people, you need to ______.

3. Extra words are used to help ______.

4. ______ is as important as learning language structure.

5. How do you say "Don't smoke here." politely? ______

单项选择题