【多选题】登高作业传递工具零部件时允许传递方式有哪些?
【单选题】当用数字式万用表检查线路通断时,显示“1”则表示( )。
【判断题】使用数字式万用表,测电阻时可以不调零。()
【判断题】数字式万用表测量电阻时,可以不进行调零。
【判断题】反证法与选言证法均属于直接证明的范畴。()
【单选题】Madonna and Michael Jackson are not considered heroes because ______.
A.
they are not clear about the principles they should follow
B.
they are popular only among certain groups of people
C.
their primary concern is their own financial interests
D.
their performances do not improve their fans morally
【单选题】数字式万用表在测量电阻时,档位选择正确后,如果显示为 ”0”, 代表电阻值为( ),表示线路为( )