问题
单项选择题
简单算术平均数作为加权算术平均数特例的条件是（）
A、各组权数相等
B、各组权数不相等
C、各组标志值相等
D、各组标志值不相等
答案
参考答案：A
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简单算术平均数作为加权算术平均数特例的条件是（）
A、各组权数相等
B、各组权数不相等
C、各组标志值相等
D、各组标志值不相等
参考答案：A
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| When Josie left school she had no idea what she wanted to do. A friend of hers, who was a year older, and 1 name was Josephine, was at art college, and she 2 Josie to join her there. Josie’s father worked in a factory, and her mother in a shop. They were 3 their money to buy their own house, and they had 4 that Josie would start earning too as soon as she 5 , so when she told them that she wanted to go to art college, she 6 them to have objections(异议). But in fact they had 7 . “You will have to find some kind of a job to _8_ your college,” Josie’s mother _9_ her. “You father and I will be very happy to keep you _10 but we have no money for your college courses and none for paints and all the other things you’ll need.” “Thank you very much,” Josie answered. “I’m really very grateful to you both. And there’s _11_ about getting a job; the head of the art college has _12_ me one in their library.” After a few months, Josie’s parents really felt very _13_ that their daughter was going to college, especially _14 she brought home some of the things she had painted, for which she had received high praise from her teachers. | ||||
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