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【多选题】
影响物质荧光特性的结构因素有()。A.
分子刚性和共面性
B.
取代基
C.
长共轭结构
D.
是否含有氧原子
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举一反三
【单选题】—I don't think people will use money. Everything will be free. —Well, _________. [ ]
A.
I agree
B.
I don't
C.
I will
D.
I won't
【单选题】I don't think people should keep pets, because animals are happier____.
A.
free from
B.
rich in
C.
in the wild
D.
contain
E.
luxury
【单选题】I don't think people should keep pets, because animals are happier ________
A.
in the nature
B.
in the wild
C.
in the water
D.
in the forest
【简答题】Complete the sentences with the following words or expressions: luxury free from rich in in the wild contain Fruit and vegetables are vitamins. Sara's parents have a lot of money .She i...
【单选题】出入无人值守的电梯时,陪同者应
A.
先进、先出
B.
先进、后出
C.
后进、先出
D.
后进、后出
E.
：B
F.
.遵守交通礼仪是个人的礼仪修养规范,也是交通安全的根本保障,下列说法不正确的是
G.
行路的基本礼则是前为尊、后为卑
H.
行路的基本礼则是左为大、右为小
I.
三人同行时,中央为尊
J.
行走时要相互体谅,礼让三分
【简答题】It is very difficult to know people and I don't think one can ever really know any but one's own countrymen.
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