单项选择题

在功能权限字典中，应该存储用户所拥有的权限，还是存储禁止的权限，为什么？

A．您在课程讨论区发帖了，但不认真。
B．您在课程讨论区根本没有发帖。
C．您在课程讨论区发帖了，但是拷贝他人的帖子。
D．您确实在课程讨论区针对本题目发帖了，必须诚实！

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单项选择题

Take scientists involved in the research on "Two missiles and one satellite" in China over fifty years ago. At that time, we did get some help from the Soviet Union, but most of the research was conducted by Chinese scientists on their own. Out of patriotism and amid a severe famine, these scientists did almost all the calculations by hand, worked on research day and night, and finished one experiment after another. They had no one but themselves to turn to. Their diligence and devotion finally paid off. Without the spirit of self-reliance, nothing could have been possible in such a short time.
This paragraph is unified.
A、正确
B、错误