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【单选题】
Students suffer from anxiety conditions because ______.A.
they do not have their parents' financial support
B.
they are worded that they don't get paid on time
C.
they run out of money and can't cover their living expenses
D.
they can't afford to buy insurance for themselves
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【单选题】Constant superheat is maintained at the evaporator outlet of a refrigeration coil by a .
A.
solenoid valve
B.
low pressure cutout switch
C.
king valve
D.
thermal expansion valve
【简答题】请点击链接,进入该网站复习上课尝过的单词: https://quizlet.com/_5ay5qz
【单选题】Which of the listed statements is correct concerning refrigeration systems?（）
A.
Dehydrators must be used continuously in a refrigeration system
B.
A 25 ton refrigeration system has the same cooling effect as melting 25 tons of ice in 24 hours
C.
A thermostatic expansion valve is used to control refrigerated space temperature
D.
The liquid receiver functions to collect and remove non- condensable gases
【多选题】根据材料，回答下列各题 甲房地产开发公司(以下简称甲公司)拟开发一新项目，现需要通过市场调研了解不同类型项目的销售前景，以便更好地掌握市场，进行准确的市场定位，最终做出正确的决策。 甲公司对房地产市场营销活动进行调研时，除了要对房地产市场竞争情况进行调研，还需要对（ ）等方面进行调研。
A.
房地产产品
B.
房地产价格
C.
房地产促销
D.
房地产竞争
【简答题】甲公司为开发新项目，急需资金。2000年3月12日，向乙公司借钱15万元。双方谈妥，乙公司借给甲公司15万元，借期6个月，月息为银行贷款利息的1.5倍，至同年9月12日本息一起付清，甲公司为乙公司出具了借据。 甲公司因新项目开发不顺利，未盈利，到了9月12日无法偿还欠乙公司的借款。某日，乙公司向甲公司催促还款无果，但得到一信息，某单位曾向甲公司借款20万元，现已到还款期，某单位正准备还款，但甲公司...
【单选题】In a compression refrigeration cycle, the temperature of the liquid refrigerant experiences its greatest decrease in the_____.
A.
evaporator
B.
compressor
C.
expansion valve
D.
condenser
【单选题】In the refrigeration compressor the temperature of the vapor is _____ by compression.
A.
raised
B.
risen
C.
reduced
D.
maintained constant
【简答题】What was essential to a science of refrigeration according to the passage?
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