问题
选择题
下列气体中不能用浓硫酸干燥的是 [ ]
A.O2
B.CO2
C.NH3
D.SO2
答案
答案:C
下列气体中不能用浓硫酸干燥的是 [ ]
A.O2
B.CO2
C.NH3
D.SO2
答案:C
选择方框内的单词完成句子,只需填选项号。
小题2:My friend is ___________ me. We are both quiet. 小题3:Harbin is in northern China, and it’s the ____________ of the three cities. 小题4:---How far is the aquarium from here? –It’s only about five _________ meters away. 小题5:Last week’s talent show was a great _____________. 小题6:He stopped playing soccer _____________ his sore back. |