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问题 单项选择题 B型题

1946年通过的第一个关于人体实验的国际文件（）。

A.《希波克拉底誓言》

B.《赫尔辛基宣言》

C.《夏威夷宣言》

D.《纽伦堡法典》

E.《人体构造》

答案

参考答案：D

填空题

Java语言中，有一个类是所有类或接口的父类，这个类的名称是______。
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问答题

Over the last three years a scientist had an average (arithmetic mean) yearly in come of $45,000. The scientist earned 1  times as much the second year as the first year and  times as much the third year as the first year. What was the scientist’s income the second year ？
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