The major goal of USB was to define an external expansion bus which makes adding (71) to a PC as easy as hooking up a telephone to a wall-jack. USB 2.0 is an evolution of the USB 1.1 (72) , providing a higher performance interface.

A．peripherals

B．outside

C．inside

D．beside

个人住房贷款中，对购买首套自住房且套型建筑面积在90平方米以下的，贷款的发放额度一般是按拟购(建造、大修)住房价格扣除其不低于价款( )的首期付款后的数量来确定。

A．10%

B．20%

C．30%

D．50%