【单选题】在间歇反应器中等温进行一级不可逆反应 A→R ,当转化率达 90 %时,所需反应时间为 2h ,若反应改在管式反应器中进行,空时为 2h ,其它条件同间歇反应器,则转化率为
【单选题】— I wonder if I _____ smoke here. — No, you ______ . Couldn't you see the sign 'NO SMOKING' on the wall? [ ]
【单选题】Why couldn't Karl promise anything?
A.
He didn't want to lend Larry a hand.
B.
Larry's case was too serious.
C.
Larry would be found guilty for sure.
D.
The other members of the jury might not listen to his recommendation.
【单选题】At first, his teacher couldn’t’ realize that Lang Lang had a ________ for music though he said he wanted to learn the piano so much.
【单选题】在间歇反应器中等温进行一级不可逆反应A→R,当转化率达90%时,所需反应时间为2h若反应改在管式反应器中进行,空时为2h,其它条件同间歇反应器,则转化率为()。
【单选题】The traffic was so much noise that I couldn’t hear what he________ .
【单选题】关于等电聚焦电泳,下列叙述哪个是错误的
B.
特别适用于分子量不同而电荷相同的蛋白质的分离
D.
适用于分子量相同而电荷不同蛋白质或多肽的分离
【判断题】Parick couldn’t walk after an accident.
【单选题】—What's up? —Such a noise ______ that I couldn't go on with my work.
【单选题】________ enough time, but he couldn’t do it better.