The man ____ around our school is from America.

A．which you showed

B．you showed him

C．you showed

D．where you showed

下面有关移动存储器的叙述中，错误的是

A．闪存盘(优盘)和移动硬盘的使用越来越普遍

B．闪存盘的存储容量比移动硬盘的容量小

C．移动硬盘不能通过USB接口与PC机相连

D．闪存盘与移动硬盘都支持即插即用