-Let's play computer games. - ________. A. It doesn't matter B. No, I don't C. That sounds really boring D. It's nothing
对于非0实数，存在实数θ，使得cosθ=成立。则=_______
与人口合理容量呈正相关的有（ ）①地区开放程度②资源数量③科技发展水平④文化消费水平A．①②③ B．①③④C．①②④ D．②③④
化学与我们的生产密切相关，请试用所学过的化学知识解释下列现象或做法的原因（用化学方程式表示）： （1）人的胃液中含有少量盐酸，服用含少量
毛泽东思想的精髓和根本出发点是( ) A．实事求是 B．群众路线 C．独立自主 D．党的建设
At a meeting, a well-known speaker lifted up a bill of 20 dollars before starting his speech. Facing 200 people, he asked, “Who wants this 20-dollar bill?” A great many hands were put up. Then h
--- I think her dress comes from the 1980s. --- It _____ be from that time. It looks so modern on her. A. won’tB. can’t C. mustn’t D. wouldn’t
关于文艺复兴的实质，几个同学展开了讨论，大致有以下四种说法，你认为哪个观点正确? A．古代希腊、罗马文化的复兴 B．封建文化的兴起
，
，则
的值为 ．
