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【简答题】
废气再循环装置常见故障,在发动机____转或____工况,EGR阀起作用。正常情况下,EGR阀不应该起作用。这是因为由于废气再循环阀与高温的废气接触,经过一定时期使用后,会使废气再循环阀结胶、积炭,从而造成阀门密封性能变差,甚至使阀门卡住而,导致怠速时废气进入进气歧管,造成怠速运转____,严重时会造成怠速下____。此外,维修中将废气再循环装置的真空软管插错也会导致这一故障。
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【单选题】What is the author's attitude towards international games?
A.
Nations that meet on a football field are unlikely to meet on a battlefield.
B.
Nations that win the football World Cup are regarded as the best in all aspects.
C.
Nations that win in international games prove the best on the sports field at least.
D.
Nations that give much attention to international competitions are world-famous in many ways.
【单选题】What do we learn about the woman’s sister from the dialogue?
A.
She likes watching football games．
B.
She is a fan of a local football team．
C.
She is a keen football player herself．
D.
She likes the local women football players．
【简答题】The boys playing footbal l are in Class 2.
【简答题】半抗原(hapten)的名词解释
【简答题】抗原决定簇(表位) 2.TD-Ag 3. 异嗜性抗原(Forssman抗原) 4.TI-Ag 5. 交叉反应 6. 佐剂(adjuvant) 7. 超抗原 8. 抗原 9. 半抗原(hapten) 10. 类毒素
【单选题】What is the author's attitude towards international games?
A.
Nations that meet on a football field are unlikely to meet on a battlefield.
B.
Nations that win the football World Cup are regarded as best in all aspects.
C.
Nations that win in international games prove best on the sports field at least.
D.
Nations that give much attention to international competitions are world-famous in many ways.
【简答题】半抗原(hapten)(名词解释)
【简答题】抗原决定簇(表位) TD-Ag 异嗜性抗原(Forssman抗原) TI-Ag 交叉反应 佐剂(adjuvant) 超抗原 抗原 半抗原(hapten) 类毒素
【单选题】What is the author's attitude towards international games?
A.
Nations that meet on a football field are unlikely to meet on a battlefield
B.
Nations that win the football World Cup are regarded as best in all aspects.
C.
Nations that win in international games prove the best on the sports field at least.
D.
Nations that give much attention to international competitions are world-famous in many ways.
【简答题】半抗原（hapten）
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