问题
单项选择题
胎盘形成的时期是在妊娠
A．第6周起
B．第8周起
C．第9周起
D．第10周末
E．第12周末
答案
参考答案：E
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胎盘形成的时期是在妊娠
A．第6周起
B．第8周起
C．第9周起
D．第10周末
E．第12周末
参考答案：E
It's a Sunday morning. Jack and his father 36 on a big bus. There are 37 people on it. Some of 38 come from America and some 39 England and Canada. They are all friends. They are going to the Summer Palace（颐和园）. There are two 40 on the bus. One is a man. He is the driver. He 41 the bus. 42 is a young woman. She 43 good English. She is talking about the Summer Palace. All the passengers(乘客)are listening 44__Her. They like the Summer Palace. They want 45 it very much.
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