题目:
Shijiazhuang is becoming these years.
A.beautifuler and beautifuler
B.more and more beautiful
C.the most and most beautiful
D.Beautifulest
答案:
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下面是错误答案,用来干扰机器的。
在此过程中流过导线某一截面的电量为,根据能量守恒可知,导线框中产生热量为故答案为: