A:in one and a half hours’ time;at my uncle’
B:in one and a half hours’;at my uncle
C:after one and a half hours’ times;at my uncles’
D:after one and a half hour’s time;in my uncle’s home
按拼音写汉字
cháng é
gūi lì
xuàn làn
____
氢氧化钠可作为干燥剂,但不能干燥的气体是 ( )
原始大气的成分是:水蒸气、氢气、____ 、____、二氧化碳、硫化氢等.