题目内容

两瓶不同种类的理想气体,它们的温度和压强都相同,但体积不同,则单位体积内的气体分子数n,单位体积内的气体分子的总平动动能(Ek/y),单位体积内的气体密度ρ,下列说法正确的是()。

A. n不同,(Ek/V)不同,ρ不同
B. n不同,(Ek/V)不同,ρ相同
C. n相同,(Ek/V)相同,ρ不同
D. n相同,(Ek/y)相同,ρ相同

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通过与指数表现或相似基金的相互比较进行的绩效衡量被称为绝对衡量。 ()

A. 正确
B. 错误

Mr. Smith moved to another town, and soon he needed a new doctor, so he went to see one. He sat down in the waiting room and looked around. The doctor's degrees (学位证书) were on the wall. Suddenly Mr. Smith remembered: there had been a classmate with the same name in his class at school, and he had become a doctor.
As he went to see the doctor, he remembered a young handsome student, and was sad to see how old and heavy(迟钝的)and grey(头发花白的)this man looked. He said to him, "Good Morning, doctor. Did you go to King High School?"
The doctor answered, "Yes, I did."
"Were you there from 1942 to 1946?" Mr. Smith asked.
"Yes, I was," the doctor answered. "How did you know?"
Mr. Smith laughed and said, "You were in my class!"
"Oh?" the doctor said and looked at him carefully for a moment. "What were you teaching?"
Mr. Smith ______, so he needed a doctor.

A. visited a town
B. went to live in another town
C. went away from a town

Li Ming was born ______ May 6, 1988.

A. on
B. in
C. at

A.whatB.thatC.whom

A. what
B. that
C. whom

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