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【单选题】
汽车空调制冷系统中冷凝器的作用是( )A.
储液、干燥和过滤液态制冷剂
B.
对压缩机排出的高温高压制冷剂进行冷却
C.
将经过节流降压后的液态制冷剂沸腾汽化
D.
维持制冷剂在制冷系统管路中的循环流动
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举一反三
【简答题】The feed rate specified in F code is effective until ________.
【简答题】effective的比较级是( )
【简答题】大蒜的有效成分大蒜素具有消毒杀菌作用．大蒜素的化学式为C 6 H 10 S 3 ，下列说法正确的是（ ） A．大蒜素属于氧化物 B．大蒜素由6个碳原子、10个氢原子和3个硫原子构成 C．大蒜素中碳元素、氢元素和硫元素的质量比为36：5：48 D．大蒜素中硫元素的质量分数最低
【单选题】There are at least three ways to promote more effective use of the earth's resources for food: cultivate the oceans, develop higher-protein cereals, and increase the palatability of rarely consumed fo...
A.
increasing food supply by fish farming
B.
regulating off-shore fishing
C.
imposing quotas on the quantity of fish annually caught
D.
decreasing fish consumption in order to protect ocean resources
【简答题】It's said that the agreement ______ between the two companies last month will become effective from May 1st. A) to sign B) signed C) to be signed D) signing
【单选题】Studying in an English-speaking country is a very effective way to learn English.
A.
True
B.
Fasle
【简答题】6A级-Today, as natural resources become scarcer and manufacturing costs rise, recycling is (important) _____ than ever.
【单选题】下列几项中，不属于医院感染的是
A.
肿瘤患者住院化疗期间出现带状疱疹
B.
本次感染直接与上次住院有关
C.
无明显潜伏期的感染，在入院48小时后发生的感染
D.
婴幼儿经胎盘获得的感染
E.
新生儿经产道时获得的感染
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