__(1)__越高,屏幕上图像的闪烁感越小,图像越稳定,视觉效果也越好。当前PC机中该指标大多采用__(2)__Hz。空白(1)处应选择()
You can _____ some bottles of wine, or some chocolates, or a bunch of flowers.
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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