气体分馏塔回流量的大小对塔顶的压力和温度有何影响?
参考答案:
回流量大,则塔顶压力低,温度也低,回流量小则相反。
After graduating from a university.I paid a visit to was once our primary school the workers use as a store.
A.which,where
B.where;that
C.what;that
D.where;which
简述艺术批评的特征。