【17】 表示由主机送往打印机的选通信号。
参考答案:STB
解析: 表示由主机送往打印机的选通信号是STB。
—Do you often see him____soccer in the field?
—Yes. Look! You can see him ____ there now.[ ]
A. play; play
B. playing; playing
C. play; playing
D. playing; play
对于采取全额包销方式销售的股票,其销售最长日期为()天。
A.90
B.60
C.360
D.180