问题
单项选择题 A1/A2型题
下列属于两性离子型表面活性剂是（）
A.肥皂类
B.脂肪酸甘油酯
C.季铵盐类
D.卵磷脂
E.吐温类
答案
参考答案：D
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下列属于两性离子型表面活性剂是（）
A.肥皂类
B.脂肪酸甘油酯
C.季铵盐类
D.卵磷脂
E.吐温类
参考答案：D
| 从方框中选择单词完成短文，必要时做出相应的变化。 | |
found it was _2_ small. In the park, there were two different ways. One was wide and clean. There were lots of flowers on both sides. The _3_ was narrow (狭窄的) and dirty. Grass grew everywhere. But finally I decided to follow the_4_ way. Ah! There was a small _5_ there. It was the most beautiful garden I had ever seen. There were trees, flowers and chairs. I thought it was the best part of the park. Many people _6_ me that there is _7_ to see in the park. Now I tell them. If they follow the right _8_, they would feel differently. When I'm telling them they just smile at me without answering. I know they don't believe_9_. My trip to the park that day made me understand _10_ about study. Don't be afraid to choose a different way. Be brave. You may get a big surprise! 1._____ 2._____ 3._____ 4._____ 5._____ 6._____ 7._____ 8._____ 9._____ 10._____ |
则有（）。