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【简答题】
下列化合物,哪些能与自身同种分子形成分子间氢键 、哪些能与水分子形成分子间氢键 。 A 、乙醇; B 、 CH 3 OCH 3 ; C 、 NH 3 ; D 、 HF ; E 、 CH 3 COOH ; F 、丙酮
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举一反三
【单选题】In some cases, recycling could be hazardous to the environment if special precautions are not taken because ______.
A.
industrial emissions are sometimes created in the process
B.
chemical waste is sometimes produced as a result
C.
a great deal of energy is expended to create new products
D.
there are a lot of bacteria in waste things
【多选题】下列关于一般进口货物的完税价格中的佣金描述正确的有
A.
购货佣金就是买方佣金,是不能计入关税完税价中的
B.
购货佣金就是买方佣金,能计入关税完税价中的
C.
所有发生的佣金都不能计算在完税价格中
D.
购货佣金指买方为购买进口货物向自己的采购代理人支付的劳务费用
【简答题】In some cases, people support human cloning because they are unwilling to
【单选题】In this chapter, some cases will be introduced to readers ______ people with strong determination achieve their goals by working extremely hard. [ ]
A.
when
B.
who
C.
which
D.
where
【单选题】In some cases, different approaches to the same scientific problem lead ______ conflicting theories.
A.
at
B.
to
C.
of
D.
for
【单选题】In some cases，different approaches ________ the same scientific problem lead to conflicting theories.
A.
to
B.
in
C.
of
D.
for
【简答题】Indeed, in some cases, scientific advances are animal tests ______.
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