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【单选题】
下列各种含氢的化合物中含有氢键的是A.
HCl
B.
HF
C.
CH4
D.
HCHO
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举一反三
【单选题】Although some old people live near their sons or daughters, ______.
A.
they still feel lonely
B.
they want to move to other places
C.
they have no time to look after the young people's children
D.
they like to live with their own brothers and sisters
【简答题】vt. (fml.) give sb. information about sth. 介绍;使认识;使了解
【简答题】a____ vt. ( fml. ) give sb. information about sth. 介绍;使认识;使了解
【单选题】- How do you do? -_____
A.
How are you?
B.
Good afternoon.
C.
I'm fine.
D.
How do you do?
【单选题】－How do you do? －_____. [ ]
A.
Hello.
B.
How are you?
C.
How do you do?
D.
I'm fine, thank you
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