轨道衡两端平直道不小于()。
A、10米;
B、20米;
C、25米
参考答案:C
The walls are made _______glass bottles. [ ]
A. of used
B. from used
C. of using
D. from to use
暖气声低,无酸腐气味,食欲减退,多属
A.食积胃脘
B.肝气犯胃
C.脾胃气虚
D.热邪犯胃