硬件是计算机系统中物理装置的总称。 ( )
参考答案:对
解析: 硬件是肉眼可以看见的物理实体,是计算机系统中物理装置的总称。
Never before______ so highly successful in his attempts to forecast the weather accurately on a small scale.
A.man has been
B.man is
C.has man been
D.will be man
总铁结合力在下列哪种疾病升高
A.PNH
B.缺铁性贫血
C.海洋性贫血
D.再生障碍性贫血