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【单选题】
猪的正常呼吸数为（）次/分钟。A.
10-30
B.
12-35
C.
20-40
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】恒牙的钙化是在 __就开始了
【单选题】Don't _______ too late. or you will feel tired in class. [ ]
A.
wake up
B.
get up
C.
stay up
D.
stand up
【单选题】下列哪一项不是采用表示层—业务逻辑层—数据访问层(三层架构)来开发应用程序的目的:
A.
可以很容易地用新的实现来替换原有层次的实现
B.
可以降低各层之间的依赖
C.
可以极大地降低维护成本和维护时间
D.
可以尽量少地写代码
【单选题】Many teenagers don't get enough sleep because they have too much homework, which _____ them up at night. [ ]
A.
stays
B.
keeps
C.
makes
D.
remains
【单选题】Don't _________too late, or you'll be tired during daytime.
A.
get up
B.
set up
C.
stay up
D.
show up
【单选题】Don't ____ too late, or you will feel tired in class tomorrow. [ ]
A.
wake up
B.
get up
C.
stand up
D.
stay up
【单选题】—Don't _____ too late, or you will be tired tomorrow. —I won't, Mom. [ ]
A.
stay up
B.
get up
C.
wake up
D.
call up
【单选题】Don't ______ too late tonight or you'll get tired tomorrow. [ ]
A.
stay up
B.
get up
C.
wake up
D.
clean up
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