问题
单项选择题
对四级离心式压缩机讲，如果三级的冷却效果不好，就会使进入四级的气温升高，影响其性能曲线，那么可能会发生喘振在（）级。
A.一
B.二
C.三
D.四
答案
参考答案：C
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对四级离心式压缩机讲，如果三级的冷却效果不好，就会使进入四级的气温升高，影响其性能曲线，那么可能会发生喘振在（）级。
A.一
B.二
C.三
D.四
参考答案：C
I agree with the saying that some people “see old memories as a chance to deal with the past and unite past and present.” Many people are so ___1___ by things that happened in their past that they are not able to focus on the ___2___ . For example, in the book Ceremony, the main character, Tayo, cannot concentrate on the present because he can’t forget his troubled childhood and ___3___ continues to relive things that happened during that time. However, past memories can help people to ___4___ in the present. A ___5___ example of people learning from the past would be the Marshall Plan. After the ___6___ of World War II there were many war-torn countries around the world in need of ___7___ assistance to help rebuild their countries, and the United States would have to be the one to ___8___ that assistance. Many American politicians thought it was ___9___ for the US government to spend money abroad on countries that would not be able to repay it for a long time. However, George Marshall, a former US general, remembered how the exact same ___10___ of "why should we spend money on war-torn nations that really owe us reparations (赔款)?" had been used after World War I towards Germany. The ___11___ of assistance towards Germany after World War I had caused a gigantic economic depression in Germany that had made the Mark (German money) virtually ___12___ . The German people became so desperate that they started ___13___ an extreme German nationalist named Adolf Hitler, who eventually started World War II. Marshall knew that if the US did not ___14___ war-torn Germany and, especially, Japan, we could ___15___ have a World War III on our hands.
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