感应耐压试验不能采用50Hz频率交流电源,而应采用100~400Hz频率的交流电源。
参考答案:对
But if you allow me to be frank, it's the people, especially, the younger generation that I'm ______.
A.worried about
B.taken in
C.likely to be
D.agreed at
单台仪表的校准点应在仪表全量程范围内均匀选取,一般不应少于5点。回路试验时,仪表校准点不应少于3点。