我们把半坡原始居民制作的陶器称为[ ]
A.彩陶
B.黑陶
C.白陶
D.素陶
答案:A
I kept on _______to her until the train disappeared completely in the darkness.
A.waved
B.to wave
C.waving
D.and waved
工作中突然断电,则存储器()中的信息将全部丢失,再次通电后也不能恢复。
A.ROM
B.ROM和RAM
C.RAM
D.硬盘