Question

一个学生在点A向北偏东60度方向走30米，到达B再从B点沿北偏西30度方向走40米。到达点C，此时恰好在A的正北

一个学生在点A向北偏东60度方向走30米，到达B再从B点沿北偏西30度方向走40米。到达点C，此时恰好在A的正北方向，则下列说法不正确的是
A，点A到BC的距离为30米
B，点B在点C的南偏东30度方向40米处
C，点A在点B的南偏西60度方向30米处
D，A，B，C，均不正确
并说明为什么？

Answer 1

A错：A到B点的距离不是垂直距离，不等于到BC的距离
B对
C对
D错
这道题实际就是每个点要重设坐标轴。勾股定理的简单应用。

Answer 2

Green would prefer to seal down if the beginning group to visit towards the university

Allen, Dayton Celtic

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(2) on the implementation with the second season of Ten dollars million player choice: I'd like this issue I do not think an excessive amount of, I think this is the league's greatest and many promising team, I am here to remain four years, it's necessary to continue. Can stay here to demonstrate self-worth, to be honest I believe we could prove once more,jordan air, and this evidence cannot be stuck in that aspect, so I am willing and Paul Pierce, Kevin Garnett, Rajon Londo together to prove we could do more

Answer 3

D错 上面三个都是对的