皮皮学，免费搜题
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【单选题】
【图片】两个直径相差甚微的圆柱体夹在两块平板玻璃之间构成空气劈尖，如图所示，单色光垂直照射，可看到等厚干涉条纹，如果将两个圆柱之间的距离拉大，则【图片】范围内的干涉条纹A.
数目增加，间距不变
B.
数目增加，间距变小
C.
数目不变，间距变大
D.
数目减小，间距变大
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
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【单选题】The house ______ on the edge of the town will be their villa.
A.
to build
B.
being built
C.
building
D.
having built
【简答题】A．Apartment. B．Villa. C．Flat. D．House.
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