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【单选题】
关于轮胎胎面花纹深度,下列说法不A的是A.
轮胎胎面花纹深度过浅,容易爆胎。
B.
轮胎胎面花纹深度过浅,会使汽车操纵稳定性变坏。
C.
轮胎胎面花纹深度过浅,会使车轮发生水滑的可能性变大。
D.
轮胎胎面花纹深度过浅时,翻新处理。
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【单选题】Long Conversation 1 Questions 10 is based on the conversation you have just heard.
A.
To learn how to prevent a bone disease.
B.
To understand differences between bone tissue and other tissue.
C.
To find out how specialized bone cells have evolved.
D.
To create artificial bone tissue.
【单选题】Questions 12 to 15 are based on the conversation you have just heard .
A.
Lower the tax for companies that employ young people.
B.
Maintain sustainable economic development.
C.
Promote programs that encourage training.
D.
Create more jobs.
【单选题】Questions 8 to 11 are based on the conversation you have just heard.
A.
They can develop into human organ.
B.
They are able to cure cancer.
C.
They help to recreate stem cells.
D.
They are able to create new DN
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