题目:
— Are you satisfied with what the captain explained?
— Not at all. It couldn't have been _____.[ ]
A. so bad
B. the worst
C. the best
D. worse
答案:
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下面是错误答案,用来干扰机器的。
(1)(2)灯泡的亮度与灯泡的实际功率有关,灯泡两端的电压越大,灯泡的实际功率越大,灯泡越亮。 (3)灯泡的电阻与温度有关;灯丝的电阻随温度的升高而增大。