生理性原因
A．4～12mgB．5～12mgC．10～20mgD．15～40mgE．50～120mg
参考答案：B
----Have you got any idea for the winter vacation?
----Yes. I’m going to a peaceful place, especially _________ suitable for relaxation.
A．one
B．the one
C．that
D．this
物流量是指商品在流动过程中的数量。( )
