某氮的氧化物中N和O的质量比为7:16。则该氧化物的化学式为() A.NO B. 发布时间:2017-05-21 11:46 │ 来源:www.tikuol.com 题型:选择题 问题: 某氮的氧化物中N和O的质量比为7:16。则该氧化物的化学式为 ( )A.NOB.NO2C.N2O4D.N2O5
题型:选择题 阅读理解。 WANTED BABYSITTER (临时照顾婴儿者) Do you like kids? Do you have time in the afternoon? We need a babysitter for our son. He is six years old. Hours are Monday to Friday,3:00 pm.T0 6:00pm.Pay(工钱)is$10 each hour. For the job, you will(将):★Watch our son ★Read to him ★Play with him You will work at our house. We live in Beijin9,near Wang fujing subway(地铁)station. Please call 010.29564938. Ask for Miss Li.1. The babysitter only works _______. A. in the morning B. in the afternoon C. on Sundays D. on Saturdays2. The babysitter works for________ hours every day from Monday to Friday. A. one B. two C. three D. four 3. The babysitter will _________. A. read to the son B. write stories for the son C. clean the room D. cook for the son4. The babysitter can get ________ dollars every week. A. 210 B. 120 C. 30 D. 1505. Which of the following is NOT true(不正确的)? A. The baby is six years old. B. The babysitter will work at the baby's house. C. The baby lives near a subway station. D. If you want the job, please call Mr. Li at 29564938. 查看答案
题型:选择题 企业购入需要安装的机床一台,买价150 000元,增值税额25 500元,支付运杂费l 800元,支付包装费630元。该机床又发生安装费6 280元。款项均以银行存款支付,机床安装完毕交付使用,编制支付机床价款、税金、运杂费、包装费、安装费和交付使用的会计分录。(按照2009年1月1日固定资产增值税改革前的方法核算)(6分) 查看答案
题型:选择题 A:条件(1)充分,但条件(2)不充分. B:条件(2)充分,但条件(1)不充分. C:条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分. D:条件(1)充分,条件(2)也充分. E:条件(1)和条件(2)单独都不充分,条件(1)和条件(2)联合起来也不充分.动点p的轨迹为圆. (1)动圆与圆(x+3)2+(y-4)2=4相外切,且两圆圆心的距离为5,P为动圆的圆心; (2)动点p的轨迹方程为. 查看答案