备用发电车须按规定进行定期保养,并且每()须起机试验一次,检查机组状态。
A.5天
B.10天
C.15天
D.20天
参考答案:C
大型颚式破碎机的给矿口宽度应大于600毫米。
根据汉语提示完成句子,每空一词。
1. 裁判把奖金颁给赢得比赛的自行车选手,并向他祝贺。
The judge gave a prize and his ____ to the cyclist who won the ____.
2. 被困在煤矿里两天的矿工们最后得到了营救。
The miners who had been ____ in the mine for two days were finally ____.
3. 记者意识到女孩很害怕,而且尽力地回避问题。
The reporter realized that the girl was ____ and trying to ____ his question.
4. 大火摧毁了离这儿四个街区的两个商店。
The fire ____ two shops which were about four ____ from here.