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【简答题】
中枢免疫器官又称_____________ ,是 _____________发生、分化和成熟的场所,人类和其他哺乳动物的中枢免疫器官包括________和_____________。
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【简答题】在齿轮传动使用过程中,不同的应用环境会导致齿轮出现不同的失效形式。在什么样的应用环境下,齿轮易出现齿面磨损的失效形式?为了避免或减少齿轮的齿面磨损,可以采用什么样的措施? 拍照后上传
【简答题】I need a ___________ sugar for my coffee. (lump of / bottles of)
【单选题】听力原文：M: The article I'm reading says that watching giant pandas at the zoo has a soothing effect on people. W: How come? Q: Where is the conversation probably taking place? (18)
A.
At the movie theatre.
B.
At a cafeteria.
C.
At the Zoo.
D.
At the library.
【简答题】齿轮传动的五种失效形式分别为轮齿折断、（）、（）、（）和齿面塑性变形。
【单选题】Which of the following statements is not tree?
A.
China has the ambition to become a giant in the aviation industries.
B.
The first homemade jetliner of China will be on the market later this year.
C.
China plans to open new overseas markets in Asia, Africa and South America.
D.
Airbus has more market share than Boeing in the field of China's civil aviation.
【单选题】In the sentence 'I had a lump in my throat and a lot of sad thoughts on my mind...' the figurative device 'metaphor' is used, and which word can tell?
A.
throat
B.
thought
C.
lump
D.
mind
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