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【判断题】
一个完全竞争企业处于短期均衡时，AVC和AC都是下降的。A.
正确
B.
错误
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举一反三
【单选题】It was not long__________ the rain stopped and the bright sun came out again．A.thatSXB
A.
It was not long__________ the rain stopped and the bright sun came out again． A.that
B.
ago
C.
before
D.
until
【单选题】The heavy rain stopped the visitors ______ the village.
A.
from leaving
B.
leaves
C.
from leave
【单选题】It was ______ his office.
A.
not until the rain stopped did he leave
B.
not until did the rain stop that he left
C.
not until the rain stopped when he left
D.
not until the rain stopped that he left
【简答题】可以区别甾体皂苷和三萜皂苷的反应为( )
【单选题】听力原文：M: Has the rain stopped? W: Stopped? Look at my clothes. They are soaked. Q: What does the woman mean? (14)
A.
The rain has stopped.
B.
She wants to soak her clothes.
C.
She is looking for her clothes.
D.
It's raining heavily.
【单选题】Although the heavy rain stopped, it was at least an hour later that the flood began to ______
A.
retire
B.
recede
C.
recline
D.
retreat
相关题目：
【单选题】The heavy rain stopped the visitors ______ the village.
A.
from leaving
B.
leaves
C.
from leave
参考解析：
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