— Let's play table tennis after work, shall we?
— ________ I can't wait to do that.
A:Forget it!
B:Think nothing of it!
C:Why not?
D:Not at all
常染色体遗传病包括:____ .
系数化成整数且结果化为最简分式: 0.25a−0.2b0.1a+0.3b =____.
物质的加热是中学化学实验的重要基本操作.加热的方式常用的有三类:(1)直接在酒精灯上加热;(2)通过水浴加热;(3)通过石棉网用酒精灯加热.以下7个化学实验:
①浓盐酸与二氧化锰制取氯气;②苯与浓硝酸、浓硫酸的混合酸反应制硝基苯;③电石与水反应制乙炔;④乙醇与浓硫酸制取乙烯;⑤乙醛溶液与银氨溶液的银镜反应;⑥甲醛溶液与新制氢氧化铜悬浊液反应.
A
⑴What's your favourite colour?____
⑵What colour is the desk?____
⑶What do you like to do?____
⑷What colour do you like?____
⑸Do you like brown?____
B
A. It's black.
B. My favourite colour is blue.
C. I like green.
D. Yes, I do.
E. I like to draw a picture.