搜题请搜索小程序“爱下问搜题”
问题 单项选择题

关于预制预应力混凝土简支梁混凝土蒸汽养护时梁体混凝土表层与环境温差的描述，正确的答案是（）.

A、不宜超过10℃

B、不宜超过15℃

C、不宜超过20℃

答案

参考答案：B

填空题
双曲线y=
2
x
的两支分别位于第______、______象限．
查看答案
选择题

The business success has made the Apple the focus of world attention. ________, the effort made by Jobs, its founder, has paid off.

A．On the contrary

B．In a nutshell

C．On the other hand

D．For short
查看答案