题目内容

下列属于天然的两性离子表面活性剂( )

A. 苯甲酸类
B. Tego
C. 苯扎溴铵
D. 肥皂类
E. 豆磷脂

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下列属于阳离子表面活性剂的是( )

A. 硬脂醇硫酸钠(十八烷基硫酸钠)
B. 卵磷月
C. 硫酸化物
D. 苯扎溴铵
E. 脱水山梨醇脂肪酸类

临界胶東浓度的缩写是( )

A. CMC
B. GMP
CM
D. CMC-Na
E. GMS

圆形水桶，顶部及底部用环箍紧，桶内盛满液体，顶箍与底箍所受张力之比为

A. 1/2
B. 1
C. 2
D. 3

[音频]Complete the sentences with words from Exercise A.I. have a terrible . It hurts very badly.2. My grandfather is very healthy. He likes toevery day.3. Recently I don’t have any. I guess I need to sleep more.4. Coughing is a common of a cold.5. You can buy medicine at the .6. I have many things to worry about. It gives me a lot of .7. If you are in pain, try taking a couple of.8. Your pulse is one of your .