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问题 单项选择题

液氨系统的管道设计压力不低于（）Mpa，设计温度不低于（）℃，最低设计温度应根据当地最寒冷月份最低气温平均值确定。

A.2.5m，50℃

B.2.16m，50℃

C.2.16m，80℃

D.2.5m，80℃

答案

参考答案：B

判断题

（）海关不能对通信进行检查。
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选择题

According to China's Food Safety Law, ______________ in February 2009, the State Council established the Food Safety Committee to oversee a chain of departments.

A．as is passed

B．as it was passed

C．which is passed

D．which was passed
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