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【判断题】
The air filter is used in the engine to trap contaminants, yet provide a free flow of air into the engine. Air filters which are usually used in cars are made of paper element. These filters permit air to flow into the engine with little resistance.
A.
正确
B.
错误
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举一反三
【单选题】Which of the following is NOT correct? ______
A.
In the 19th century, women could not vote.
B.
In the 19th century, women could not sign contracts.
C.
In the 19th century, women could choose their own husbands.
D.
In the 19th century, women had no rights.
【判断题】淬火加中温回火的热处理工艺称为调质处理。()
A.
正确
B.
错误
【单选题】Which of the following works best represent the national spirit of the 18th-century England?
A.
Robinson Crusoe
B.
Gulliver's Travels
C.
Jonathan Wild the Great
D.
A Sentimental Journey
【单选题】通常将淬火加(   )相结合的热处理称为调质处理。
A.
低温回火
B.
中温回火
C.
高温回火
【判断题】一般将淬火后加高温回火的热处理称为调质处理。
A.
正确
B.
错误
【单选题】Viral marketing is:
A.
a marketing campaign initiated through a virus.
B.
a type of spyware that attaches itself to some other application.
C.
a marketing campaign that persuades consumers to encourage friends to purchase the same products or services.
D.
a type of negative marketing plan that criticizes its competitors.
【判断题】53淬火加高温回火的热处理称为调质处理。
A.
正确
B.
错误
【判断题】淬火加高温回火的热处理称为调质处理,钢调质处理后组织为回火索氏体。
A.
正确
B.
错误
【判断题】淬火加高温回火的热处理工艺统称为调质处理。
A.
正确
B.
错误
【单选题】通常把淬火加( )的热处理称为调质处理。
A.
低温回火
B.
中温回火
C.
高温回火
D.
正火
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