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【单选题】
51单片机内部有2个()可编程定时器/计数器A.
4
B.
8
C.
16
D.
32
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反馈参考答案：
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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