可用率
参考答案:
机组运行小时数与机组备用小时数之和占总的统计期间小时数的百分数,称为可用率。
句型转换
小题1:The information is very important.(改为感叹句)
information it is!
小题2:Susan’s mother asked her , “Have you packed your things?” (改间接引语)
Susan’s mother asked her had packed her things.
小题3:The engineer didn’t control the computer at once.(改为被动语态)
The computer by the engineer.
小题4:You have to get to the museum by eight o’clock tomorrow morning. (改为否定句)
You to get to the museum by eight o’clock tomorrow morning.
小题5:The students would rather go to bed early than stay up late in the past. (保持句意基本不变)
The students going to bed early to up late in the past.
成年人上颌尖牙单个缺失后,通常首选的修复方式是()。
A.种植义齿修复
B.活动义齿修复
C.粘接桥修复
D.双端固定桥修复