各种标号的水泥应符合国家规定的产品质量标准。工程施工中不得使用过期的水泥，可以使用受 发布时间：2018-02-07 06:00 │ 来源：www.tikuol.com 题型：判断题 问题： 各种标号的水泥应符合国家规定的产品质量标准。工程施工中不得使用过期的水泥，可以使用受潮的水泥。
题型：判断题 阅读对话，从每题A、B、C、D四个选项中，选出一个最佳答案完成对话。 A: Hi, Li Tao! Could you please tell me something about your new pen pal? B: 1______ A .Thanks. What's his name? B: His name is Richard Evans and he's living with his parents in Hangzhou now. A: Uh-huh. Where is he from? B: He comes from Canada. Richard was born in Toronto. A: Uh-huh. 2______ B: He's 15 years old. A: 3______ B: Oh, he speaks English and French, and he says he is learning Chinese now. A: Really? Many foreigners think Chinese is a difficult language. 4______ B: Yes, he does. But he works very hard at it. His family are going back to Canacla this July. He has invited me to take a vacation there and he can learn Chinese from me by the time, A: How cool! Have you decided to go? B: Yes, I have. 5______ ( )1. A. Sure.( )2. A. How is he? ( )3. A. What class is he in? ( )4. A. Why does he learn Chinese? ( )5. A. I can also learn English from him. B. Of course not.B. Where is he? B. What is his hobby? B. Does he also think it hard to learn Chinese? B. I can practice Chinese with him, too.C. I don't know. C. What is he? C. How many languages does he speak? C. Who does he learn Chinese from? C. He can also teach me Chinese. D. Sorry. I can't. D. How old is he?D. Who is his Chinese teacher? D. How does he learn Chinese? D. He can learn English from me, too. 查看答案
题型：判断题 有关牙本质的描述，正确的是（）A.管周牙本质矿化程度高，胶原纤维极少B.管间牙本质较管周牙本质矿化程度高C.发育完成的牙较正发育的牙前期牙本质厚D.球间牙本质主要见于牙根部牙本质牙骨质界E.生长线又叫芮氏线，是与牙本质小管垂直的间歇线 查看答案
题型：判断题 为去除下列物质中烦人杂质（括号内为杂质），下列操作方法不能达到目地的是（ ） 选项物质（杂质）操作方式ACu（Fe）加足量的稀硫酸，充分反应后过滤BCO（O2）缓慢通过灼热的铜网CNaCl溶液（Na2CO3）加盐酸至恰好不再产生气泡为止DFeSO4溶液（CuSO4）加入足量的铁屑，充分反应后过滤A．Cu（Fe）加足量的稀盐酸，充分反应后过滤B．CO（O2）缓慢通过灼热铜网C．NaCl溶液（Na2CO3）加稀盐酸至恰好不再产生气泡为止D．FeSO4（CuSO4）加入足量铁屑，充分反应后过滤 查看答案