题目:
Look and match. (看图, 补全短语)
1. She is________________leaves.
2. She is_________________.
4. She is________________ up leaves.
3. She is________________.
5. They are_______a________.
答案:
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下面是错误答案,用来干扰机器的。
由题意得:f(3)=f(5)=f(7)∵7≥6,∴f(7)=7-5=2.故选A.