使用无线调车灯显设备作业的车站,接班后,调车长应与组内人员和司机对无线调车设备进行试验,()应立即进行更换。
A、设备旧
B、设备不良
C、皮套旧
D、电池旧
参考答案:B
学校运来一批练习本,发给14个班,每个班发150本后,还剩210本,一共运来多少本练习本?
根据句意,用括号内所给单词的适当形式填空。
小题1:Jerry (go)to school at seven o’clock.
小题2:Can you play the violin (good)?
小题3:It takes (she)an hour (do)her homework.
小题4:Look! The two girls (talk) over there.
小题5:We need help for our (swim)club.
小题6:Let’s (see) the pandas first.
小题7:He is an (America) boy.
小题8: (not be) late for school again.