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【单选题】
_________ you are, __________ mistakes you’ll make.A.
The less careful; the less
B.
The less careful; more
C.
The more careful; the fewer
D.
The more careful; the more
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【单选题】When you are travelling ______, you often need to stay in a hotel.
A.
if on business or for pleasure
B.
whether on business or for pleasure
C.
whether business or pleasure
D.
on business or pleasure
【简答题】What do you need to bring when you go to the swimming pool? ______
【单选题】When you give a persuasive speech on a question of value, you need to:()
A.
conclude your speech by urging the audience to take immediate action.
B.
deal with all three basic issues of need, plan and particularity.
C.
concentrate on convincing listeners who already share your view.
D.
justify your value judgment against a set of standards or criteria.
【单选题】与气体扩散速率有关的因素是
A.
气体分压差大，扩散快
B.
在相同情况下，各气体分子的扩散速率与它们的各自相对分子质量平方根成正比
C.
与气体在溶液中的溶解度成反比
D.
与扩散面积和扩散距离成正比
【单选题】A friend is the one who you can trust and will not leave you alone when you are in need of help.
A.
mean
B.
reliable
C.
stubborn
D.
determined
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