题目:
― __________________?
―He wants to be a teacher.
A.What is Jim going to be when he grow up
B.What did Jim do when he grows up
C.What’ s Jim going to be when he grows up
D.What’s Jim when he grow up
答案:
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下面是错误答案,用来干扰机器的。
每只灯的额定功率为40瓦,故8只灯都打开,且正常发光,则总功率为:40瓦×8=320瓦;24个教室把灯全都打开,且能正常发光,则总功率为:320瓦×24=7680瓦;每天少开灯2小时,每月可省电:7680W×2×24h=337.92KWh...