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【多选题】
关于单凝聚法制备微囊表述,正确的是A.
在单凝聚法中加入硫酸钠主要是增加溶液的离子强度
B.
在沉降囊中调节pH值到8~9,加入37%甲醛溶液于15℃以下使微囊固化
C.
影响成囊因素除凝聚系统外还与明胶溶液浓度及温度有关
D.
单凝聚法是相分离法常用的一种方法
E.
单凝聚法中调节pH至明胶等电点即可成囊
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举一反三
【单选题】Which of the following statements is TRUE according to the text?
A.
The reason for the ECB's unwillingness to cut interest rates is that inflation was actually expected to fall in Germany.
B.
In Germany consumer prices were falling.
C.
Last year's oil prices dropping out of the year-on-year calculation directly leads to the drop of inflation.
D.
The European Central Bank is willing to cut interest rate.
【单选题】According to the text, which of the following is true?
A.
It’s always true that teachers’ quality is important.
B.
Salaries in school are higher than those in other industries.
C.
The average quality of the teachers in America is declining.
D.
Administrators have many effective ways to choose best teachers.
【单选题】In the author's opinion,______.
A.
it is true that life in America is much faster than that in any other city
B.
people living outside big cities are lazy and miserable
C.
most American people enjoy living in the suburbs of big cities
D.
those who are busy are not necessarily unfriendly
【简答题】某设备有 3 台电动机,控制要求如下:按下起动按钮,第一台电动机 M1 起动,运行 5s 后,第二台电动机 M2 起动, M2 运行 10s 后,第三台电动机 M3 起动;按下停止按钮, 3 台电动机全部停止。
【简答题】People ask the Government to pay more attention to______.
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