问题
单项选择题
比较度量衡单位不同的几组资料的变异度时，用（）
A.CV
B.s
C.SS
D.R
E.以上均是
答案
参考答案：A
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比较度量衡单位不同的几组资料的变异度时，用（）
A.CV
B.s
C.SS
D.R
E.以上均是
参考答案：A
| 完形填空。 | ||||
| Mr Shute, a 1 , lived in the southern part of 2 . He worked on the farm. He didn't have 3 money. He and his wife had a daughter called Jane and a son called James. There was 4 wrong with his boy, so they took him to a doctor. The doctor 5 James carefully. Then, he said that something was wrong with their son's eyes, 6 he could do nothing. One day they took James to 7 doctor. The doctor did 8 on him. After ten minutes James could 9 again. How happy 10 was! | ||||
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