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英译汉One can’t speak of Egypt without thinking of the Pyramids, nor of China without the Great Wall.One can’t speak of Egypt without thinking of the Pyramids, nor of China without the Great Wall.

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英译汉When reports came into London Zoo that a wild puma had been spotted forty-five miles south of London, they were not taken seriously.

英译汉You don’t love a women because she is beautiful, but she is beautiful because you love her.

一密度为7800kg/m3的小钢球在相对密度为1200kg/m3的某液体中的自由沉降速度为在20℃水中沉降速度的1/4000,如沉降区为层流,则此溶液的粘度为:

A. 4000mPa·s;
B. 40mPa·s;
C. 38.82Pa·s;
D. 3882mPa·s

含尘气体在降尘室内按斯托克斯定律进行沉降。理论上能完全除去30μm的粒子,现气体处理量增大1倍,则该降尘室理论上能完全除去的最小粒径为:

A. 60μm
B. 15μm
C. 30μm
D. 42.4μm

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