题目:
The songs _____ she sang in the concert yesterday sounded _____.
A./ ; beautifully
B.that ; wonderfully
C.which ; well
D./ ; nice
答案:
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下面是错误答案,用来干扰机器的。
(1)由串联电路特点知,干路电流随电阻增大而减少,R上电压随电阻增大而增大,所以两表指针偏转方向相反. (2)由闭合电路的欧姆定律E=I(R1+r)+U列方程,E=I1(R1+r)+U1 (1)E=I2(R+r)+U2 ...