刮墨刀片的硬度不是越硬越好。
参考答案:对
(2014年(春)重庆市高三考前冲刺测试卷)5. Traditionally __ as one of the safest planes, the Boeing 777's reputation has been damaged by the second crash in less than a year.
A.to be regarded
B.regarded
C.having been regarded
D.regarding
A.用交流电压表测该电源电压时,示数是6V
B.用交流电压表测该电源电压时,示数是6V
C.用此电源给电磁打点计时器供电时,打点的时间间隔为0.01s
D.把标有“6V 3W”的小灯泡接在该电源上时,小灯泡将被烧毁