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单选题
629.Make sure that the intensity of the reticle light decreases gradually to zero( )
629.Make sure that the intensity of the reticle light decreases gradually to zero( )
A
Make sure that the brightness of the reticle light rapidly drops to zero.
B
Make sure that the intensity of the reticle light lessens radically to zero.
C
Make sure that the brightness of the reticle light is gradually reduced to zero.
答案解析
正确答案：C
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