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【单选题】
警笛声的一高一低,警灯的一闪一闪,都容易引起人强烈的注意,这是指( )
A.
刺激物的强度
B.
刺激物的新异程度
C.
刺激物的对比程度
D.
刺激物的活动变化状态
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Some of the most popular attractions across America are the many free concerts offered to public throughout the year. These involve not only amateur performers, but professional artists as well. The p...
A.
have the necessary facilities
B.
call attract more visitors
C.
want to serve the public
D.
are in a position to invite musicians