凝汽器底部采用若干组弹簧支撑,其目的是()。
A.承受凝汽器自重;
B.补偿凝汽器热膨胀;
C.承受凝汽器水侧的水重;
D.a和b。
参考答案:D
Which general weather conditions should you expect to find in a low pressure system().
A.Fair weather
B.Precipitation and cloudiness
C.Scattered clouds at high elevations
D.Gradual clearing and cooler temperatures
对于企业未使用、不需用固定资产,不应计提折旧。 ( )