在有电机车架线的运输大巷中铺设、维修注浆管路时可以不停架线电，但要时刻注意来往车辆，过电机车时要及时躲避。
参考答案：错
—I called you last night, but there was no answer,
—Oh, I'm sorry. I dinner at my friend's home. [ ]
A. have
B. had
C. was having
D. have had
下列与房室结内折返性心动过速发病有关的概念，哪些正确（）
A.房室结内双径路
B.β（快）路径传导速度快而不应期长
C.α（慢）路径传导速度缓慢而不应期短
D.期前发生的房性搏动下传受阻于α（慢）路径
E.正常窦性冲动由β（快）路径下传
