题目内容

当FOSC=6MHZ和FOSC=12MHZ时,最大定时值各为多少?

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已知FOSC=12MHZ,试编写程序在P1.0输出脉冲,每秒产生一个脉宽1ms正脉冲,每分产生一个脉冲10ms正脉冲。

下列关于向量组的极大线性无关组的说法中,错误的是( ).

A. 一向量组的极大线性无关组与向量组本身等价
B. 一向量组的极大线性无关组一定是不唯一的
C. 一向量组的任意两个极大线性无关组等价
D. 一向量组的任意两个极大线性无关组含有相同个数的向量

According to the passage, what is a gap year?

A. It is the one-year-long break after high school.
B. It is the one-year-long break before or after high school.
C. It is the one-year-long break after university.
D. It is the one-year-long break before or after university.

According to the passage, why do students take a gap year?

A. To have a good rest.
B. To travel to different countries.
C. To get more experiences and prepare for future career.
D. To explore interests and develop a purpose for the future.

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