苗圃地水源含盐量不能超过（）
A、0.1%
B、1%
C、0.2%
D、2%
参考答案：C
— Did you go to the exhibition on May 18th?
— Of course. There were many kinds of Taiwan fruits ______.
A. on show B. on duty C. on business
滑阀的中位机能
