问题
单项选择题
侏儒症的病因是（）
A.人幼儿期生长激素分泌不足
B.人幼儿期甲状旁腺分泌不足
C.人幼儿期肾上腺皮质分泌不足
D.人幼儿期甲状腺分泌不足
E.人幼儿期胰岛素分泌不足
答案
参考答案：A
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侏儒症的病因是（）
A.人幼儿期生长激素分泌不足
B.人幼儿期甲状旁腺分泌不足
C.人幼儿期肾上腺皮质分泌不足
D.人幼儿期甲状腺分泌不足
E.人幼儿期胰岛素分泌不足
参考答案：A
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| The Newspaper Boy Billy is fourteen years old and in the ninth grade. He has a part-time 1 which gets him up every morning at five o'clock. He is a 2 boy. Each morning, Billy 3 the house at 5:15 to go to the corner 4 the newspapers are. The newspapers were 5 to the corner 6 truck at midnight. He always takes a wagon to carry them. In the winter it is still 7 when he gets up, but during the rest of the year it is light. Billy must deliver the newspapers to the 8 of people on his route in all kinds of weather. He tries to put each paper on the porch (门廊) where it will be protected 9 wind and rain or snow. His 10 think he does a good job. Sometimes they give him tips. Billy 11 about $70 per month, and he is saving some of the money to go to 12 . He 13 the rest on records and clothes. Once a month, he has to 14 money from his customers. Since many of them work during the day, Billy has to collect the money at 15 . Sometimes, when Billy is 16 , his older brother has to deliver the newspapers. Once, Billy's father had to help. Billy has seventy 17 now, but he hopes to get 18 soon. Someday, if he gets many more customers, Billy might win a prize for being an outstanding newspaper boy. He wants to win a 19 to Europe, but he will be 20 if the wins a new bicycle. | ||||
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