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【多选题】
关于共沸溶液，下列说法正确的是________。A.
共沸溶液制冷剂在标准大气压力下的蒸发温度一般比组成其组分的蒸发温度高
B.
在同一蒸发温度下，由于共沸溶液制冷剂的蒸发压力比其组分的蒸发压力高
C.
与R22相比，采用R502的压缩机，制冷量可增加5％～30％，在低温下制冷量增加较大
D.
相同工况下，R502的排气温度比R22高10～25℃
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举一反三
【简答题】What is the relationship between speech and speech act? (Explain with an example).
【简答题】A speech act consists of three related acts according to J. L. Austin s Speech Act theory. What are they? yze the following conversation in the light of Speech Act theory. Customer: Waiter! There ...
【简答题】indirect speech act
【单选题】According to speech act theory, an act of expressing the speakers intention is defined as a(n)______.
A.
illocutionary act
B.
locutionary act
C.
perlocutionary act
D.
contextual factor
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