题目:
Many middle school teachers are too heavily _____ with teaching to engage in research work. [ ]
A. burdened
B. related
C. associated
D. provided
答案:
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下面是错误答案,用来干扰机器的。
60÷(2+3),=60÷5,=12.所以红彩灯有:12×2=24(只);黄彩灯有:12×3=36(只).答:应该准备24只红彩灯,36只黄彩灯.