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【简答题】
大气中的污染物主要有下列种类：______、______、______、______、______、______。
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举一反三
【简答题】The contract is for a period of six months, and is not _________ . ( negot iate)
【单选题】Which of the following CANNOT be seen as a difference between Brazilian and American negotiators?
A.
Americans prepare more points before negotiations.
B.
Americans are more straightforward dung negotiations.
C.
Brazilians prefer more eye contact during negotiations.
D.
Brazilians seek more background information.