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人体所需的营养素主要包括（）（）（）（）（）（）六大类。

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Activity 2Fill in the blanks with the proper form of words given in the brackets.1. There have been calls for a new kind of security _(arrange).2. We were most impressed with your (efficient).3. The manager spoke to them all (individual).4. The Chinese people maintain a strong cultural(traditional).5. Keep your office space looking good, ____(particular) your desk.