皮皮学，免费搜题
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搜题
【单选题】
下列分子的中心原子中采取不等性 sp 3 杂化轨道成键的是A.
BF 3
B.
HgCl 2
C.
BeH 2
D.
H 2 O
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皮皮学刷刷变学霸
举一反三
【单选题】This coat is _______ in the shop. [ ]
A.
expensive
B.
the most expensive
C.
more expensive
D.
most expensive
【单选题】Who most likely is the man?
A.
A doctor.
B.
A nurse.
C.
A flight attendant.
D.
A technical assistant.
【简答题】Where does this conversation most probably take place? [A] In a shop. [B] At a hotel. [C] In a travel agency
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