I/O系统所带外设种类、数量多,且速度差异大时,宜采用专用总线来作I/O总线。
参考答案:错
Good pencil erasers are soft enough not ________paper but hard enough so that they crumble gradually when used.
A.by damaging
B.so that they damage
C.to damage
D.damaging
下列哪项因素不致影响微循环血流灌注()
A.周围血管异常扩张
B.血容量不足
C.心功能不全心排出量减少
D.代谢性酸中毒
E.慢性间歇性出血