普通空调系统，下列哪一项空气宜过滤()
A．仅新风
B．仅回风
C．新风、回风
D．仅送风
参考答案：C
表中实收资本的金额为( )元。
A．31250
B．30000
C．1250
D．10750
A lot of people were made tired of the lecture which ________as long as four hours.
A．kept
B．went on
C．continued
D．lasted
