【简答题】听力原文:Man: Good morning. I ordered some paper from you a week ago and you promised to send it to me immediately. It should have been here by now, but I haven't received it. This is really unacceptable....
【简答题】Annie: Hi, Ben. _ . Ben: Great! I just went for a jog. I feel _ _ ! Annie: Good for you. Hey, I have something I want to give you. It ’ s an article I printed off the Internet. I thought you might be ...
【单选题】听力原文:S Excuse me. Professor Miller. Can I talk to you for a few minutes? I need to ask you about my classes. A Hello, Lisa. I know its a bit late, but Merry Christmas. Are you having problems with any...
答案 ABC 解析 气体放出热量,若外界对气体做功,温度升高,其分子的平均动能增大,故 A 正确;布朗运动不是液体分子的运动,但它可以说明液体分子在永不停息地做无规则运动,故 B 正确;当分子力表现为斥力时,分子力和分子势能总是随分子间距离的减小而增大,故 C 正确;第二类永动机不违反能量守恒定律,但违反了热力学第二定律,故 D 错误;某固体或液体的摩尔体积为 V ,每个分子的体积为 V 0 ,则阿伏加德罗常数可表示为 N A = ,而气体此式不成立,故 E 错误.