扳手不得()使用。
A.当锤
B.加套筒
C.调皮带跑偏
D.紧螺丝
参考答案:A, B
电动机的温升是在规定其环境温度为()℃时,电动机允许超过环境温度的温度值。
A.40
B.45
C.60
—Many people eat ______ meat than they did before.
—Yes, that's why they're getting fatter and fatter. [ ]
A. more
B. less
C. fewer
D. much