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They always want eggs for breakfast. ()

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透镜组是由多片的凸凹透镜组成的,它的作用是()。

A. 消除视差
B. 减弱视差
C. 利用各种透镜的性能互相抵消,减弱像差,提高结像质量
D. 彻底消除像差

Detroit has been known as the automobile capital of the world. ()

Tone is not a distinctive feature. ()

The White House is the official residence of the President and to the east of it stands the Capitol, the building where the US Congressmen meet to make laws for the nation. ()

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