下列公式，在现场实测大气污染源时计算污染物源强的是（） A．∑G投入=∑G产品+∑G 发布时间：2018-01-03 14:48 │ 来源：www.tikuol.com 题型：单项选择题 问题： 下列公式，在现场实测大气污染源时计算污染物源强的是（）A．∑G投入=∑G产品+∑G流失B．C．D．
题型：单项选择题 完形填空。 My hobby is playing chess one of the greatest games in the world. My morn taught me 1 to play when I was seven years old. She 2 me every time for the first year. But then, on my 3 birthday, I won for the first time. Now I am always the winner between us. It takes about a day to learn the rules. 4 if you want to be good ,you have to practice for years. You don't need much to play chess—just a chess set and someone to play with. Chess sets 5 be verycheap, or quite expensive. Some people collect chess sets as a hobby, but I 6 to play. There is a chess club in our school. We meet every week to play with each other. I am the best 7 in the club , and the captain of the school chess team. This year we 8 the all England schools' championship(冠军). I had to go up on stage (台子). in front of the whole school to collect theprize. I'm saving up my money to buy a chess 9 . It's very good for practice. That way I'll 10 have someone to play with, and I'm sure I'11 make more progress.( )1. A. what ( )2. A. hit ( )3. A. seventh ( )4. A. And ( )5. A can ( )6. A want ( )7. A. player ( )8. A. received ( )9. A. computer ( )10. A. sometimes B. why B. beat B. eighth B. So B. must B. wish B. fan B. won B. book B. sometimeC. how C. fought C. ninth C. But C. should C. prefer C. learner C. lost C. dictionary C. always 查看答案
