安装前,160kN级以下瓷、玻璃绝缘子抽取不少于批量1%~3%的产品进行工频耐压试验。
参考答案:错
When our personal interests are _____ those of people, we should put people's interests before our own. [ ]
A. conflicting
B. in conflict with
C. conflict with
D. in conflict against
如图,一木块放在水平地面上,在水平方向上共受到三个力即F1=10N,F2=4N和摩擦力作用,且木块处于静止状态,若撤去力F1,则木块在水平方向上受到的合力为
A.10N,方向向左
B.4N,方向向右
C.4N,方向向左
D.零