计算机关机断电后（ ）中的数据全部丢失
A．软盘
B．硬盘
C．RAM
D．ROM
参考答案：C
I can't find my pen. Let me ___________. [ ]
A. go and ask her
B. go and ask hers
C. go and ask she
D. go ask her
把一个长方体的橡皮泥捏成一个正方体后，所占空间[ ]
A.长方体大
B.正方体大
C.一样大
