高压断路器的额定电压指的是相电压。()
参考答案:错
His sudden look of fear made _____ clear that he had something to do with the matter.
A.him
B.this
C.it
D.that
当讨论四轮驱动(4WD)时,技师甲说:一般4WD汽车用一个分动器把发动机转矩分配给前或后驱动桥;技师乙说:常时4WD汽车都有两根传动轴,两个或三个差速器。谁正确?()
A、甲正确;
B、乙正确;
C、两人均正确;
D、两人均不正确。