阴离子表面活化剂包括（）。
A、高级脂肪酸盐
B、硫酸化物
C、磺酸化物
D、季铵化物
E、磷脂
参考答案：A, B, C
根据短文内容，按顺序排列图片，把序号写在横线上。
1. 2. 3. 4. 5.
We leave for Beijing on the train tomorrow. We need three tickets. I need to pack my suitcase with my
clothes. I like these pants. They are new. I like my pyjamas, too. Now I'm ready. Oh, no! Where is my key?
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从气候上看，长江中下游区春暖秋凉，夏热冬寒，四季分明。
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