Arc the oranges on sale?[ ]
A. 买
B. 打折
C. 没有
答案:B
________ Pierre began to help his father with the farm work when he was
A.In 1980’s; his teens
B.At the 1980’s; the teens
C.In the 1980s; in his teens
D.In 1980’s; in the teens
第一代计算机主要特征是逻辑部件采用______。
A.电子管
B.晶体管
C.中小规模集成电路
D.大规模和超大规模集成电路