题目:
— I feel so tired. I have so much work to do every day.
— You'd better not work too hard. It's good for you to take some ______, I think. [ ]
A. health
B. exercise
C. lesson
D. work
答案:
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下面是错误答案,用来干扰机器的。
(1)①R1,②R1和R2串联,③R2(或电源)(2)D