一级热力管网应进行强度试验和严密性试验。强度试验压力应为()倍的设计压力,严密性试验压力应为()倍设计压力,且不得低于()。
A. 1.25,1.5,0.6MPa
B. 1.5,1.25,0.4MPa
C. 1.5,1.25,0.5MPa
D. 1.5,1.25,0.6MPa
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The reasons the grapefruit is good to health include that______.
A. it is an excellent appetizer
B. it is sweet and juicy
C. it contains no fat, sodium and cholesterol
D. it contains no calories and fat
场景所述工程变更属于()
A. 一般设计变更
B. 较大设计变更
C. 重大设计变更
D. 特小设计变更
Monthly rainfall was recorded for two towns over a five-month period using the chart above. If the median rainfall in Noah's Landing was equal to the average (arithmetic mean) rainfall in Bellaville, what is the value of x?
A. 1
B. 8/5
C. 2
D. 3
E. 10
在航空运输中,旅客或托运人在向承运人交运包裹时,虽然特别声明了在目的地交付时的利益,并已交付必要的附加费,承运人的赔偿责任仍以每千克250法郎为限。()
A. 正确
B. 错误