下列分子式只能表示一种物质的是 A.C3H7Cl B.CH2Cl2 C.C2H6 发布时间:2017-06-14 02:02 │ 来源:www.tikuol.com 题型:选择题 问题: 下列分子式只能表示一种物质的是A.C3H7Cl B.CH2Cl2C.C2H6O D.C2H4O2
题型:选择题 国企改革中,下列()不可保留划拨国有建设用地使用权的情形。A.基础设施用地、公益事业用地和国家重点扶持的能源、交通、水利等项目用地B.关系国家安全利益、高新技术、重点技术改造项目的用地C.改造或改组后的国有企业用地D.非国有企业兼并国有企业的 查看答案
题型:选择题 选择适当的句子补全对话。A: Hi, Kate! 1. B: Oh, I've been to many places, such as Xi'an, Hangzhou, Shanghai, Guilin and Tibet. A: 2. B: Really? What places have you been to? A: Very few. I've only been to Pingyao. B: 3. A: It's in Shanxi. It's a small place, but it has a long history. It's one of the oldest towns in China. There you can see a well-kept city wall. B: 4. I've just seen a lot of natural beauties, but not much ancient Chinese culture (文化) yet. A: 5. A. You've been to more places than I have. B. Well, you'll have a lot of chances if you like. C. I've never seen such a place in China. D. Where's that? E. What places have you been to in China? 查看答案
题型:选择题 大军将一支密度计分别放入两种不同的液体中,如图所示。若两种液体的密度分别ρ甲、ρ乙,静止时密度计所受浮力分别为F甲、F乙,则 [ ]A.ρ甲>ρ乙 F甲=F乙B.ρ甲<ρ乙 F甲>F乙C.ρ乙>ρ甲 F甲<F乙D.ρ乙>ρ甲 F甲=F乙 查看答案