雨量传感器冬季停用时，Z文件中保存（）组数据构.
A.空格（4位）
B.0000
C.----
D.****
参考答案：C
The water company appealed ______ everyone ______ the amount of water used.
A．for; to reduce
B．to; reducing
C．to; to reduce
D．for; reducing
莴笋又名青笋，是一种由叶用莴苣培育而成的茎类蔬菜。( )
