为保护中华医药的知识产权,近年来不断有全国人大代表在“两会”期问提出相关的立法议案。这表明人大代表是在
A行使提案权 B制定相关法律 c.提出相关质询 D.协助法律实施
答案:A
—Shall we go swimming this afternoon?
—Sorry, I ________. I have lots of homework to do. [ ]
A. mustn't
B. needn't
C. may not
D. can't
并联谐振又称为()谐振。
A.电阻;
B.电流;
C.电压;
D.电抗。