某双级压缩中间冷却的理想压缩机,将0.1MPa的空气压缩至3MPa,其最佳中间压力应为()MPa
A.1.732
B.0.5477
C.1.55
D.1.50
参考答案:B
Many people have come to realize that they should go on balanced diet and make ______room in their day for exercise.
A.a;/
B.the; a
C.the; the
D./;a
大堤帮宽加高土方工程,土料压实后的()保证在1.5t/m3以上。