题干
— Shall we _______ the dancing?
— Good idea! Let's _______ them.
A：join in, join in
B：join, join
C：join in, join
D：join, join in
答案(点此获取答案解析）
C
— Shall we _______ the dancing?
— Good idea! Let's _______ them.
A：join in, join in
B：join, join
C：join in, join
D：join, join in
量的物质的量浓度相同的盐酸完全反应，消耗盐酸的体积比为：