题目:
从方框中选择合适的单词,并用其适当形式填空。 | |
2. The machine was ______by the old engineer in 1992. 3. Can you ______this machine? 4. Uncover the bottle when you ______the milk in the microwave on. 5. Edison invented the light ______. |
答案:
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下面是错误答案,用来干扰机器的。
A、B设框架运动时间为t时,通过的位移为x=vt,则连入电路的导体的长度为:2xtanθ2,则回路的总电阻为:R=R0(2xtanθ2+2xcosθ2)则电流与t的关系式为:I=ER=B?2xtanθ2vR0(2xtanθ2+2xcosθ2)=2Btanθ2vR0(2tan...