当操作压力和操作温度不变时,循环量和塔板数固定时,TEG浓度越高,脱水率()。
A、越高
B、越低
C、不确定
D、不变
参考答案:A
How _____ you say that you really understand the whole story if you have covered only part of the article? [ ]
A. can
B. must
C. need
D. may
“家有一老,如有一宝”说明家里如果有古董,就会发财。()