问题 问答题

为什么生产上施肥施肥浓度不可过高?

答案

参考答案:因为一般情况下土壤溶液的水势大于根部细胞的水势,根系能正常吸水。如果施肥太浓,使土壤溶液浓度过高,使其水势低于根部细胞的水势,造成吸水困难,甚至引起根部细胞失水,使植物凋萎。所以施肥浓度不宜过高。

选择题
阅读理解

任务型阅读。

     According to one study, words send only 7 percent of a person's message. Intonation (语调) and voice

quality communicate 38 percent, and nonverbal (not using or involving words) cues (暗示) transmit a large

55 percent. That means people pick up more from nonverbal communication than from the words a person

says. When studying a foreign culture then, it just makes sense to pay attention to how people use nonverbal

cues.

     Gestures consist of a major form of nonverbal communication. But often these gestures are culture-bound.

For example, when the Maoris of New Zealand stick out (伸出) their tongue at someone, it is a sign of respect.

When American schoolchildren make the same gesture, it means just the opposite. Also, Americans often

indicate "OK" with their thumb and fore-finger touching to form a circle. The same gesture means "money"

to the Japanese and "zero" to the French. For that reason, people in a foreign culture must use gestures with

caution.

     Another part of nonverbal communication is the one that you might not think about-space. When someone

comes too close, he feels uncomfortable. When he knocks into someone, he feels obligated (有义务的) to

apologize. But the size of a person's "comfort zone" varies, depending on his cultural or ethnic origin. For

example, in casual conversation, many Americans stand about four feet apart. People in Latin or Arabic cultures,

instead, stand very close to each other and touch each other often.

     Considering the effects of nonverbal communication, we never really stop communicating. How we walk,

how we stand and how we use our hands all send a message to others. That's why it's possible to "read

someone like a book".

1. How does an American feel when an Arab stands too close to him? (no more than 3 words)

    ____________________________________________________________________________________

2. What does the gesture "OK" mean in Japan? (no more than 3 words)

    ____________________________________________________________________________________

3. Why do we pay more attention to nonverbal cues in a foreign country? (no more than 10 words) 

    ____________________________________________________________________________________

4. Why should people in a foreign culture must use gestures with caution? ( no more than 10 words) 

    ____________________________________________________________________________________