机械是机构和机器的总称。
参考答案:对
The murderer was brought in, with his hands ________ behind his back.
A.being tied
B.having tied
C.to be tied
D.tied
A.柴胡、枳实、白芍
B.柴胡、白芍、甘草
C.枳实、白芍、甘草
D.柴胡、白术、白芍
E.白术、白芍、当归
痛泻药方组成中含有()
A.A
B.B
C.C
D.D
E.E