What's the relationship between the speakers？
A polieeman and a tourist.
B. A salesman a the customer.
C. Two friends.
查看答案
How long is be going to stay？
A. He is going to stay for two weeks.
B. He is going to stay for four days.
C. He is going to stay for the whole holiday.
表示某物种在一个群落内的丰富程度，常用多度。 ()
A. 正确
B. 错误
工业化农业的特点是大量使用有机肥料。 ()
A. 正确
B. 错误
水稻是属于短日照的植物。 ()
A. 正确
B. 错误
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