增压机二段去膨胀机空气流量()Nm³/h。
A.5000
B.28000
C.26200
D.48000
参考答案:C
—What would you send to your sister as the Christmas gift?
—I haven't decided yet .I _ send her a handbag. [ ]
A. shall
B. may
C. must
宏观经济发展的总体目标包括( )。
A.经济增长
B.充分就业
C.通货膨胀和缓
D.物价稳定
E.国际收支平衡