平行透视中 (____) 于画面的平面仍然保持原来的形状 (A 垂直、 B 平行 );平行于画面的轮廓线是 (____) (A原线、 B 变线 ), 它们的透视方向不变,没有灭点,水平的仍然保持水平,直立的仍然保持直立,另一组主向轮廓线必然垂直于画面,是直角水平变
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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