国家标准75%硅的含Si范围是()
A、60%-75%
B、68%-75%
C、72%-75%
D、72%-80%
参考答案:D
Let me _, please. [ ]
A. go home
B. to go home
C. to go to home
D. to home
汗证是指人体阴阳失调,营卫不和,()引起汗液外泄失常的病证。