下列实验操作正确的是 A.实验剩余的药品要放到指定容器内 B.将氢氧化钠固体放在 发布时间:2017-05-05 22:16 │ 来源:www.tikuol.com 题型:选择题 问题: 下列实验操作正确的是A.实验剩余的药品要放到指定容器内B.将氢氧化钠固体放在滤纸上称量C.用嘴吹灭燃着的酒精灯D.蒸发食盐水时,将水蒸干后再停止加热
题型:选择题 完成对话。 从方框中选择正确选项,并将其字母序号写在对话后面的空格内(方框中有一个选项与对话内容无关)。A. Let me think. B. I miss my old friends at school.C. Yes, very much. D. People who don't tell the truth. E. It helps me relax. E. And your grandma is very important to me. Adam is talking with his aunt Emma, a movie star. Adam: Do you like your work, Aunt Emma? Emma: 1______. It' s interesting. Adam: But you' re so busy. Do you feel tired? Emma: Sometimes. I can play with my dog in the park. 2______ Adam: What kind of people don ' t you like?Emma: 3______. I don't like to be with them.Adam: Me neither. What's your favorite English word? Emma: "Sorry". The English say "sorry" all the time. Adam: Is there someone important to you? Emma: Family and friends. 4______ Adam: Grandma is really great. Is there something special you do every day? Emma: That's hard to say. 5______ Oh, I know. I try to help someone every day. 查看答案
题型:选择题 Oracle针对Internet/Intranet的产品是A.Oracle WebServerB.Oracle WebListenerC.Oracle WebAgentD.Oracle 7 服务器 查看答案
题型:选择题 轻质细线吊着一质量为m=0.32 kg,边长为L=0.8 m、匝数n=10的正方形线圈,总电阻为r=1 Ω。边长为的正方形磁场区域对称分布在线圈下边的两侧,如图甲所示,磁场方向垂直纸面向里,大小随时间变化规律如图乙所示,从t=0开始经t0时间细线开始松弛,g=10 m/s2。求: (1)在前t0时间内线圈中产生的电动势; (2)在前t0时间内线圈的电功率; (3)求t0的值。 查看答案