梗丝膨胀与干燥后其温度应大于或等于60℃,允差为()℃。
参考答案:±3
Considering your salary, you should be able to ____ at least twenty dollars a week.
A.set up
B.set out
C.set down
D.set aside
氨冷器注满液氨其换热效果将会变好。