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【简答题】
在汽油机上燃烧均质稀混合气有什么优点？它所面临的主要困难是什么？目前解决的途径有哪些？
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举一反三
【单选题】听力原文：F: Here's some coffee. M: Oh, fantastic. Well, is there any sugar? What does the man want?
A.
Ice cream.
B.
Sugar.
C.
Wine.
【单选题】听力原文：W: It is said that there are some check authorization systems currently in use. M: But they are cumbersome relative to the computerized credit card validation systems. Q: What does the man think ...
A.
They are convenient.
B.
They are advanced in technology.
C.
They are cumbersome.
D.
They are computerized.
【单选题】A man with a bleeding hand hurried in and asked, “Is there a hospital around ______ I can get some medicine for my wounded hand?”
A.
that
B.
which
C.
where
D.
what
【单选题】听力原文：M: Right, class begins. There are some changes to your exam timetable. Your math exam will be changed to the next day. W: You mean the 18th? M: Yes, and the exam will start and end one hour earli...
A.
Exam results.
B.
Time for the exam.
C.
Change of class hours.
【单选题】听力原文：M: What was the party like last night, Jane? W: Really Fantastic l There are some interesting people there, and we have had a good time together. Why couldn't you come? M: Well, I had to work ove...
A.
He didn't like the host.
B.
He was not invited.
C.
He has another appointment.
D.
He had a headache after work.
【单选题】— Wha t’ s ____ your class roo m ? — There are some big trees.
A.
in front of
B.
in the front of
C.
in front
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