按送风管道风速分类，低速系统对于民用和公共建筑，主风道风速不超过( )。 A．10m 发布时间：2017-12-31 15:35 │ 来源：www.tikuol.com 题型：单项选择题 问题： 按送风管道风速分类，低速系统对于民用和公共建筑，主风道风速不超过( )。A．10m/s B．11m/sC．12m/s D．13m/s
题型：单项选择题 下列生产、生活等实际应用中，不能用勒夏特列原理解释的是（ ）A．热的纯碱溶液去油污效果好B．合成氨工业中使用铁触媒做催化剂C．饱和FeCl3溶液滴入沸水中可制得氢氧化铁胶体D．实验室配制FeCl3溶液时，应向其中加入少量浓盐酸 查看答案
题型：单项选择题 阅读下面短文，从短文后所给的四个选项中，选出可填入空白处的最佳选项。 Hello, everyone! My name is Ken. I'm 1 years old. I was born (出生) in 1999. My birthday is 2 . That's National Day (国庆节). I like music very much and I 3 like sports. My birthday is coming. My mother 4 buy a beautiful shirt 5 me. On Sunday, she 6 me to a big 7 store. There are 8 shirts and they are 9 blue,yellow and red. She selects (选了) a blue one. It looks cool. My father gives me some CDs and a 10 . He knows what I like. He wishes(希望) me to play sports more. I am very 11 . And my sister, Monica, she is only two years old, so she can't buy anything for me. 12 she sings a great song for me. It's 13 fun. And I like her so much. My parents want to have a 14 for me at home this year. My friends will come to it. We can play together. It's very exciting 15 my friends in my house.( )1. A. eleven ( )2. A. June 1st ( )3. A. too ( )4. A. want ( )5. A. for ( )6. A. sells ( )7. A. food ( )8. A. much ( )9. A. in ( )10. A. pen ( )11. A. happy ( )12. A. Because ( )13. A. only ( )14. A. school day ( )15. A. to play withB. twelve B. July 1st B. also B. wants B. at B. takes B. clothes B. a little B. on B. notebook B. boring B. But B. not B. birthday party B. to look for C. fourteen C. August 1st C. only C. need to C. to C. buys C. fruit C. lot of C. to C. basketball C. interesting C. Then C. really C. sports game C. to learn aboutD. sixteen D. October 1st D. don't D. wants to D. on D. brings D. book D. many D. at D. hamburger D. relaxing D. Next D. a little D. speech contest D. to listen to 查看答案