220kV带电作业高架绝缘斗臂车上臂（主臂）交接试验长度为3米。
参考答案：错
解析：220kV带电作业高架绝缘斗臂车上臂（主臂）交接试验长度为1.8米。
－Mike, why are you watching TV again?
－I _________ my homework.
A. finish B. finished C. have finished
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