皮皮学，免费搜题
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【多选题】
严禁在( )的情况下,启动或保持电梯检修运行状态A.
轿门开启
B.
层门开启
C.
层门关闭
D.
轿门关闭
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】到六月底他们已经治疗了一万多病人。By the end of June they _______over 10,000 patients.
A.
had treated
B.
have treated
【单选题】听力原文：W: Hi, Bob. I heard about your accident but I didn't think it would be this bad. I can hardly recognize you. Tell me what happened? M: I just got back from Africa where I had a terrible accident ...
A.
He was badly ill.
B.
He had his legs broken.
C.
He Was hit by a car.
【简答题】新型冠状病毒的潜伏期一般为 天
【简答题】新型冠状病毒的潜伏期一般为 天
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