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蒸气压缩式制冷实际循环中，制冷剂在蒸发器中的变化过程是（ ）
A、等压吸热
B、压力下降吸热
C、等压放热
D、压力下降放热

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相关考题

未知题型
一般核酸变性的温度可选在（）
未知题型
关于脂质的化学组成，说法错误的是（）
问答题
1. Listen to a special report about German Students Protest ‘Unfair’ English Exam, and supply missing words on the blanks.
 
Thousands of German students are [填空1] school officials of creating an English exam that was “[填空2]“ difficult.
The exam is important because it is part of Germany’s Abitur system. The Abitur test is given to students who are completing high school and preparing to enter college.
More than[填空3] people have signed a petition to voice their [填空4]about the test which was recently held in the state of Baden-Württemberg.
The students say the English part of the 2018 Abitur was clearly more difficult than tests given in recent years. They are calling on school officials to consider their criticisms while[填空5] student performance and giving test results. School officials have [填空6] the test.     The said the questions were “appropriate“ for the students.
The exam is designed to test a student’s understanding and skill level in English. Part of the test requires students to read examples of English writing and then answer questions to measure how much they comprehend.
The local official [填空7] the testing process in Baden-Württemberg is the area’s minister of culture, Susanne Eisenmann.  In a statement, she said officials had carried out a full[填空8] of the exam and decided it was “appropriate“ for the students being tested. She said the review included experts in charge of graduation requirements and outside English experts.  Eisenmann said she does not think the students should worry too much about their exam results. "I have full confidence in the teachers that they will use their [填空9]to make responsible and balanced corrections,“ she said
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