如图所示一玻璃砖内有一凸形气泡一束平行光垂直射�玻璃砖的侧面通过玻璃砖后光线将会a仍然平行b会聚c�散d无法确定 题目和参考 Template




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Try and sketch some of theseCrows, Stapler, Horn, Butterscotch, Gold rush, Toast, Mountain range, Cowgirl, Waiter waitress, Splinter, view more ideas


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