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单选题 Elements are( )that can not be decomposed into simpler substances by ordinary chemical changes
学科：2024-2025第一学期石油化工专业英语
时间：2024-11-03 12:35:04
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题目1单选题
Oxygen的中文意思是:( )A. 氮气B. 氢气C. 氧气D. 空气
题目2单选题
动词分解的英文表达:( )A. decomposeB. compoundC. combineD. decombine
题目3单选题
下列属于element的是:( )A. carbon dioxideB. methaneC. copperD. carbon monoxide
题目4单选题
Elements are( )that can not be decomposed into simpler substances by ordinary chemical changesA. compoundsB. mixturesC. pure substancesD. 以上都不对
题目5单选题
Sixteen elements are not found in nature; they have been produced in generally small amounts in nuclear explosions and nuclear research. They are ( ) elementsA. man-madeB. notC. composeD. mixture
题目6单选题
nitric acid指得是:()A. 硫酸B. 硝酸C. 盐酸D. 硝酸铜
题目7单选题
提馏段的英文含义( )A. rectifying sectionB. stripping sectionC. dumped packingD. rectifying packing
题目8单选题
间歇蒸馏的英文含义( )A. continuous distillationB. continuousC. batch distillationD. batch
题目9单选题
Liquid reaching the bottom of the column is partially vaporized in a heated reboiler to provide boil-up, which is sent back up the column. ( )A. 到达塔底的液体在再沸器内汽化,被送到塔底B. 液体在再沸器内部分汽化,提供上升气流C. 塔底液体在再沸器中全部汽化,回到塔内,以提供上升气流D. 塔底液体在再沸器中部分汽化,回到塔内,以提供上升气流
题目10单选题
chlorobenzene 的中文含义是 ( )A. 二氯乙苯B. 氯乙苯C. 氯苯D. 甲苯
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