MDP拥有一个下列哪种有机键()。
A.P-C-P键
B.P-O-P键
C.P-S-P键
D.P-N-P键
E.P-H-P键
参考答案:A
解析:MDP有一个有机的P-C-P键。
—Mum. Bill is coming to dinner this evening.
—OK. Let's give him _____ to eat. [ ]
A. something different
B. different anything
C. anything different
D. different something
水能的大小取决于两个因素:河流中水的流量和水从()。