已知电容C1=4μF、C2=12μF串联相接，施加交流电U=16V，则C1两端的电压 发布时间：2017-09-07 19:57 │ 来源：www.tikuol.com 题型：填空题 问题： 已知电容C1=4μF、C2=12μF串联相接，施加交流电U=16V，则C1两端的电压U1=（），C2两端的电压U2=（）。
题型：填空题 完型填空。 Tom lives and works in Birmingham. He works 1 from Monday to Friday. On Saturday he doesnot go to 2 . Sometimes he goes shopping. Sometimes he goes to see his 3 . This week he is goingto London 4 his good friend Mike. They are going to see their good friends 5 . This is what they are going to do. They are going to take the 2:40 train 6 Friday afternoon. In London, Tom's friend Jack is going to 7 them home in his car. Tom and Mike are all going to 8 with Jack for the weekend. On Saturday morning, Jack is going to take them to a middle school. Mike's friend, MR. White, is a 9 there. On Sunday Jack is going to take them to some nice parks in London. They are going to take the 6:00 train 10 to Birmingham. ( ) 1. A. very ( ) 2. A. work ( ) 3. A. cat ( ) 4. A. for ( ) 5. A. at home ( ) 6. A. on ( ) 7. A. carry ( ) 8. A. live ( ) 9. A. student ( )10. A. back B. hard B. works B. doll B. and B. there B. at B. look after B. talk B. teacher B. off C. well C. Birmingham C. daughter C. with C. way C. in C. meet C. stay C. Young Pioneer C. drive D. good D. here D. friends D. of D. in a farm D. from D. take D. ride D. Mr. D. go 查看答案
题型：填空题 某学生为了测定一种以碳酸钙为摩擦剂的牙膏中碳酸钙的含量，设计了如下的实验：（1）用烧杯称取这种牙膏膏体100.0克；（2）向烧杯中逐渐加入稀盐酸至不再有气体放出（除碳酸钙外，这种牙膏中的其他物质不能与盐酸反应生成气体），共用去稀盐酸200.0克；写出反应的化学方程式______．（3）反应完毕后称得烧杯内物质的质量为278.0g（所有质量数据均不含烧杯质量）．由此可知，上述实验中共可生成二氧化碳______g，样品中碳酸钙的质量百分含量为______． 查看答案