【单选题】【消耗次数：1】
维持萃取塔正常操作要注意的事项不包括( )。
①
减少返混
②
防止液泛
③
防止漏液
④
两相界面高度要维持稳定
参考答案：
复制
纠错
相关题目
【单选题】
某逆流吸收塔在操作时因某种原因使吸收剂入塔量减少，以致操作时的液气比小于原定的最小液气比，则发生下列情况（? ）。
①
液体出塔浓度和气体出塔浓度均增加
②
在塔的下部将发生解吸现象
③
液体出塔浓度增加，回收率不变?
④
液体出塔浓度不变，气体出塔浓度增加
随机题目
【单选题】
3. He had to ______ his past actions when he retired, or he would be punished.
①
consider
②
account for
③
think
④
popular
【单选题】
19. The American people _____ a president every four years.
①
choose
②
elect
③
pick
④
select
【单选题】
22.___ him tomorrow?
①
Why not to call on
②
Why don’t call on
③
Why not calling on
④
Why not call on
【单选题】
13. Do you know ______ who would be interested in this topic?.
①
someone
②
no one
③
anyone
④
everyone
【单选题】
23. As everyone knows, warm ______ is comfortable in winter.
①
clothes
②
clothings
③
cloth
④
clothing
【单选题】
26. There is no doubt that she can produce work that is equal ________ anyone else’s in her class.
①
to
②
in
③
for
④
with
【单选题】
10.The local people started a campaign to force the government to ______roads properly.
①
keep
②
. remain
③
maintain
④
carry
【单选题】
22. Clint will give us _______ on our grammar study.
①
an advice
②
some advice
③
some advices
④
advices
【单选题】
27. A lot of Japanese students of English have difficult ________ the pronunciation of “b”s and “v”s.
①
to
②
in
③
for
④
with
【单选题】
21. Am I _____ your way? I can move over a bit and make room for you...
①
under
②
in
③
beyond
④
on