验资、增资户每笔收费（）
A.100元
B.50元
C.200元
D.20元
参考答案：C
When he was there, he ________ go to that coffee shop at the corner after work every day.
A．must
B．should
C．would
D．might
干沉降多层滤膜法分析结果的计算公式：C气=C液×V提取液/V样，用于干沉降中（）污染物的计算。
A．气态HNO3
B．气态NH3
C．气溶胶中的NH4+
