非离子表面活性剂（）

液体药物中的防腐剂（）

A.山梨酸
B.羟丙甲纤维素
C.甲基纤维素
D.聚乙二醇400
E.微粉硅胶

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W: How’s the evening class going?M: I’m happier with some aspects than with others, but at least I’m learning a lot of new characters and my pronunciation is improving.Q: What is the man learning?（）

A．He is definitely learning Chinese.
B．He is definitely learning English.
C．He is probably learning a foreign language.
D．He is learning interpersonal skills.

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