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问题
名词解释
五中
答案
参考答案：
指五脏（见《素问.阴阳类论》）。
计算题
已知|a|=3，|b|=5，且a<b，求a﹣b的值．
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选择题
You should do more ______. Don't always sit at the desk busy doing your ______.
A. exercise; exercises
B. exercises; exercise
C. exercises; exercises
D. exercise; exercise
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