题目

将H2、O2、N2三种气体分别放入不同容器中，当其温度、密度完全相同时，三种气体压强(p)的大小关系是(    ) A.p(H2)=p(O2)=p(N2)                     B.p(H2)＞p(N2)＞p(O2)C.p(O2)＞p(N2)＞p(H2)                   D.p(O2)＞p(H2)＞p(N2) 答案：B解析：可假设三个容器的容积相同(因为此时压强与容积大小无关)，题中条件则转变为同温同容同质量，而，即压强与相对分子质量成反比。—Let me help you prepare dinner, Mom.? —_______, but your homework hasn’t been done, you’d better finish it first.? A. That’s all right? B. You’re welcome? C. That’s very kind of you? D. I’d love to?