舟山全球通用户非漫游状态下在00:10用IP拨打010-55556666通话时长58秒,收费多少?()
A.0.7元
B.0.4元
C.0.8元
D.1.1元
参考答案:A
粗盐提纯的实验中,主要操作顺序正确的是( )
A.过滤、溶解、蒸发
B.溶解、蒸发、过滤
C.蒸发、溶解、过滤
D.溶解、过滤、蒸发
Don't be careless, or you will _______ the horse. It's very dangerous. [ ]
A. fall down
B. fall off
C. fall into
D. get off