问题
选择题
The rain was heavy, and ________ the land was flooded.[ ]
A. consequently
B. however
C. whatever
D. but
答案
答案：A
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The rain was heavy, and ________ the land was flooded.[ ]
A. consequently
B. however
C. whatever
D. but
答案：A
有多种含苯环且与其取代基相同的同分异构体，试写出其中任意三种同分异构体的结构简式___、______、_____。