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【单选题】
在勘察基站过程中，拍摄周围环境是，是每隔（ ）度拍一张照片。A.
30
B.
60
C.
50
D.
45
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反馈参考答案：
举一反三
【简答题】简述传递函数的特点。
【单选题】Sometimes Mr Black _____ his mobile phone in his office. [ ]
A.
forgets
B.
forget
C.
leaves
D.
leaving
【单选题】It is in the hotel _____ he stayed last night ______ he lot his mobile phone.
A.
that ; that
B.
that ; where
C.
that; when
D.
where; that
【单选题】(2014·山东实验中学一模)With his attention________on his mobile phone，he didn’t notice his headteacher’s appearance.
A.
fixed
B.
having fixed
C.
fixing
D.
to fix
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