— ____________ is it today?
— It's Monday.[ ]
A. What day
B. What date
C. What time
答案:A
A.80N,向东
B.80N,向西
C.120N,向下
D.280N,向东
高压无气喷涂设备的使用始于20世纪()年代。
A.50
B.60
C.70
D.80