大气中的水汽最主要的来源是: ( )
A.湖泊和河流水的蒸发
B.植物的蒸腾
C.海洋水的蒸发
D.土壤中水分的蒸发
答案:C
本题考查世界的气候。海洋水的蒸发是大气中水汽最主要的来源。
Scientists are looking forward to a time ____ people who live on the moon will be able to dine on fresh
vegetables ____ they grow. [ ]
A. /; that
B. when; what
C. where; that
D. when; which
《会计档案管理办法》规定的会计档案保管期限为最低保管期限。( )