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【单选题】
医学统计中第二步骤收集资料的任务是取得准确可靠的原始数据,其资料统计要求是A.
资料必须完整、正确和及时
B.
要有足够的数量
C.
注意资料的代表性和可比性
D.
以上都是
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【单选题】一绝热容器被隔板分成两半，一半是真空，另一半盛理想气体，若把隔板抽出，气体将进行自由膨胀，达到平衡后( )。
A.
温度不变，熵增加
B.
温度升高，熵增加
C.
温度降低．熵增加
D.
温度不变，熵不变
【单选题】一绝热容器被隔板分成两半,一半是真空,另一半是理想气体。若把隔板抽出,气体将进行自由膨胀,达到平衡后
A.
温度不变，熵增加
B.
温度降低，熵增加
C.
温度不变，熵不变
D.
温度降低，熵不变
【简答题】阅读理解。 There is a basketball team ( 队) in our school. There are twenty-six girls in the team. They play basketball from one o'clock to four o'clock every Sunday afternoon. Miss Ma is their teacher. She...
【单选题】一绝热容器被隔板分成两半，一半是真空，另一半是理想气体，若把隔板抽出，气体将进行自由膨胀，达到平衡后（ ）。
A.
温度不变，熵增加
B.
温度升高，熵增加
C.
温度降低，熵增加
D.
温度不变，熵不变
【单选题】一绝热容器被隔板分成两半,一半是真空,另一半是理想气体。若把隔板抽出,气体将进行自由膨胀,达到平衡后
A.
温度升高,熵增加
B.
温度不变,熵增加
C.
温度降低,熵增加
D.
温度不变,熵不变
【简答题】Read the passage below and choose the best answer. Growing up as an Asian in Britain is much more than a question of facing discrimination and trying to find decent job -- especially for a girl. She h...
【多选题】一绝热容器被隔板分成两半，一半是真空，另一半是理想气体．若把隔板抽出，气体将进行自由膨胀，则
A.
该过程为准静态绝热过程．
B.
该过程为等温过程．
C.
该过程气体对外做正功．
D.
该过程内能不变．
E.
该过程熵增加．
【简答题】In schools all over the world, boys and girls are studying foreign languages. Everyone knows his own language, but when you are in other countries, you are trying to understand people in other countri...
【单选题】Losing Weight Girls as young as 10 years old are dieting and in danger of developing unhealthy attitudes about weight, body image and food, a group of Toronto researchers reported Tuesday. Their study...
A.
were overweight
B.
were on a diet
C.
had unhealthy attitudes about weight
D.
had a healthy body weight
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