固体微粒由于重力作用在液体物料中自然下沉,用虹吸管吸取上清液从而达到固液分离的方法(

题型:单项选择题 B1型题

问题:

固体微粒由于重力作用在液体物料中自然下沉,用虹吸管吸取上清液从而达到固液分离的方法()

A.沉降分离

B.滤过分离

C.旋转分离

D.吸附分离

E.滤过分离

考点:初级中药士浸提、分离、浓缩与干燥浸提、分离、浓缩与干燥题库
题型:单项选择题 B1型题
用方框中所给词或词组的正确形式填空,每个词或词组只用一次
be different from; help... with; take the subway; think of; get to; look after; move; have a picnic; stand for; grow up
1. My mother was out, so I had to                          my little sister at home.
2. What about                                     in the park on Sunday?
3. Miss Gao often                                       to work.
4. The weather in China                                        that in America.
5. The twins were born in New York, but they                          in London.
6. He                          school at 7:30 every day.
7. —What do you                            the Chinese people?
    —They are very friendly.
8. Jim, let's             the stone, it's dangerous on the road.
9. UN                           the United Nations.
10. She often ______ me ______ my English.
题型:单项选择题 B1型题

It takes time for the campus culture to develop and ________, but it doesn't necessarily justify the lack

of culture on new university campus. [ ]

A. appeal to  

B. settle in

C. lay off  

D. set down

题型:单项选择题 B1型题

反应:3A(g)+B(g)=2C(g)+2D(g),在不同条件下,用不同物质表示其反应速率,分别为:

①v(A)="0.6" mol·L-1·min-1;②v(B)="0.45" mol·L-1·min-1;③v(C)="0.015" mol·L-1·min-1;④v(D)="0.45" mol·L-1·min-1

则此反应在不同条件下进行得最快的是(  )。

A.③       B.①       C.④       D.②

题型:单项选择题 B1型题

在FoxBase中要建立一个与现有的某个数据库有完全相同结构和数据的新数据库,应该使用如下语句中的哪个语句

A.CREATE

B.APPEND

C.COPY

D.INSERT

题型:单项选择题 B1型题

重大事故处理流程中主要应注意哪些?

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