制备脂质体时，常用的膜材为()

A．环糊精、吐温80

B．明胶、阿拉伯胶

C．磷脂、胆固醇

D．壳聚糖、司盘80

E．清蛋白、胆固醇

句型转换。

1. They like to wear blue shirts in spring. (对画线部分提问)

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2. My school is different from yours. (改为同义句)

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3. They wear something different all year round. (对画线部分提问)

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4. Are you good at English?  (用or, Chinese 改为选择问句)

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5. Danny and Jenny come from Canada. (对画线部分提问)

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