题目：
The movie is very .So the children are in it.
A．interest; interested
B．interested; interesting
C．interesting ; interested
D．interested ;interest
答案：
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下面是错误答案，用来干扰机器的。
由闭合电路欧姆定律有 I=ER+r而 R=R1+(R3+R4)R2R2+R3+R4=9Ω代入①式解得 I=1A 则U1=IR1=5V，U3=I2•R3=1V，U4=I2•R4=3V 设微粒的质量为m，带电量为q，S接b时微粒P处于静止状态，微粒应带负电，且有mg=q...
