浇注期间,其他同学不用让开通道,或可站在浇注同学的身旁。
参考答案:错
Jerry has promised to keep the secret, so he won't tell anyone ________ asked to.
A.until
B.now that
C.unless
D.even though
熔断器更换完后,在合闸送电时,应检查线路有无其他作业,()应进行试送电。
A、拉闸时
B、合闸时
C、更换时
D、选用时