课程咨询
扫码关注掌握一手留学资讯

扫码关注掌握一手留学资讯

回复XDF免费领

水平测试和备考资料

扫码关注公众号

GRE阅读题目解析:液态制冷剂

2017-03-20 09:54:00来源:网络

  P1

  1

  Heat pumps circulate a fluid refrigerant that cycles alternatively from its liquid phase to its vapor phase in a closed loop.

  热泵使液态制冷剂在一个闭环结构中循环,在这个过程中,制冷剂从液态到气态不停交替。

  2

  The refrigerant, starting as a low-temperature, low-pressure vapor, enters a compressor driven by an electric motor.

  低温低压蒸汽状态的制冷剂,由电机驱动进入一个压缩机。

  3

  The refrigerant leaves the compressor as a hot, dense vapor and flows through a heat exchanger called the condenser, which transfers heat from the refrigerant to a body of air.

  经过压缩机制冷剂变热,密度变大,进入一个叫做冷凝器的热交换器,把热量从制冷剂传导至一股空气。

  4

  Now the refrigerant, as a high-pressure, cooled liquid, confronts a flow restriction which causes the pressure to drop.

  现在制冷剂变成高压冷却的液体,经过限流使压力下降。

  5

  As the pressure falls, the refrigerant expands and partially vaporizes, becoming chilled.

  随着压力下降,制冷剂扩张部分气化,进一步降温。

  6

  It then passes through a second heat exchanger, the evaporator, which transfers heat from the air to the refrigerant, reducing the temperature of this second body of air. (126 words)

  然后制冷剂经过第二个热交换器,蒸馏器,它把热量从空气传导给制冷剂,使第二股空气降温。

  1. According to the passage, the role of the flow restriction in a heat pump is to

  (A) measure accurately the flow rate of the refrigerant mass at that point

  (B) compress and heat the refrigerant vapor

  (C) bring about the evaporation and cooling of refrigerant

  (D) exchange heat between the refrigerant and the air at that point

  (E) reverse the direction of refrigerant flow when needed

  选 C

  见句 4、5:

  Now the refrigerant, as a high-pressure, cooled liquid, confronts a flow restriction which causes the pressure to drop. As the pressure falls, the refrigerant expands and partially vaporizes, becoming chilled.

  bring about 使发生

  还记得上单元我们做过那个 “热泵广告让观众觉得广告商在吹牛结果大家都不买” 的文段吗,这一段就是它的后续段落。

  以上就是新东方在线GER频道为你带来的GRE阅读题目解析:液态制冷剂,更多精彩敬请关注新东方在线GRE频道。

本文关键字: GRE阅读 GRE阅读真题

添加新东方美研助教回复【GRE】获取

模考真题|写作题库|阅读机经|佛脚词汇

更多资料
更多>>
更多内容

关注新东方美研助教

回复【GRE】获取备考必看资料包

新东方美研备考资料
更多>>
更多惊喜>>
更多>>
更多资料