题目信息
R, S, T, and U are points on a line, and U is the midpoint of line segment ST. If the lengths of line segments RS, RT, and ST are 20, 4, and 24, respectively. What is the length of line segment RU?
A:6
B:8
C:12
D:14
E:16
参考答案及共享解析

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已选答案:
正确答案:
B:8
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