皮皮学，免费搜题
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【判断题】
利用示波器观察低电平信号及包含着较高或较低频率成分的波形时，必须使用双股绞合线。A.
正确
B.
错误
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】—— Have you ever seen anything like that before？ ---- ____.
A.
No，I never have seen anything like that before
B.
No，never I have seen anything like that before
C.
No，never have 1 seen anything like that before
D.
No，I have seen anything like that before never
【多选题】安装闪烁发光突起路标时,闪烁频率、安装场合应为( )。
A.
普通公路和城市道路弯道、多雾等特殊路段选(70 -80)次/min
B.
高速公路弯道、多雾等特殊路段选(200-300)次/min
C.
道路直线段多雾等特殊路段选(30±5)次/min,占空比宜为1.5:1
D.
道路直线段多雾等特殊路段选(60±5)次/min,占空比宜为1.5:1
【简答题】Fred: Have you anything particular in mind?Jenny: ______
【单选题】You have just read the newspaper . Did you find in it ?
A.
interesting anything
B.
anything interesting
C.
interesting something
【简答题】You didn' t do anything wrong, --- you should have a clear ______. A. conscience B. sense C. awareness D. understanding
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