一方无须支付任何代价取得他人物品的使用权的途径是( )。
A.交换
B.租赁
C.借贷
D.抵押
参考答案:C
I have _____ a member of the music club for many years.
A. been B. became C. joined
对车内空气清洁度的指标是按照车厢内二氧化碳的浓度来评定的,一般允许车内的二氧化碳浓度为()
A.0.2%
B.0.5%
C.1%
D.1.2%