无限循环小数\(0.777\cdots\)化为分数为( ). A: \(<br/>{7 \over {11}} \) B: \(<br/>{7 \over {10}} \) C: \(<br/>{7 \over 9} \) D: \(<br/>{7 \over 8} \)

无限循环小数\(0.111\cdots\)化为分数为( ). A: \(<br/>{1 \over 8} \) B: \(<br/>{1 \over 9} \) C: \(<br/>{1 \over {10}} \) D: \(<br/>{1 \over {11}} \)

若fpclk2=8MHz,OVER8=0,USART1需要采用9600bps的波特率通信,则USARTDIV= ，USART_BRR= ，实际波特率= 。

The competition attracted over 500 college students _____________ 8 different countries. (representation)

已知直线的一般方程\( \left\{ {\matrix{ {x - 2y - z + 4 = 0} \cr {5x + y - 2z + 8 = 0} \cr } } \right. \), 则其点向式方程为（ ） A: \( { { x - 2} \over 2} = {y \over { - 3}} = { { z - 4} \over {11}} \) B: \( {x \over 5} = {y \over { - 3}} = { { z - 4} \over {11}} \) C: \( { { x - 2} \over 5} = { { y + 1} \over { - 3}} = { { z - 4} \over {11}} \) D: \( { { x - 2} \over 2} = { { y + 1} \over { - 3}} = { { z - 4} \over {11}} \)

8 Yesterday,<br/>my sister had a quarrel ______ me over what to watch on TV.

设\( A \)是3阶矩阵，若\( \left| {3A} \right| = 3 \)，则\( \left| {2A} \right| = \)（ ） A: 1 B: 2 C: \( {2 \over 3} \) D: \( {8 \over 9} \)

In order to make a reservation over telephone, there are （）steps to follow. A: 5 B: 6 C: 7 D: 8

\(\lim \limits_{n \to \infty } { { {\rm{3}}{n^2}{\rm{ + 8}}} \over { { n^2} - n}} = \) .______

The competition attracted over 500 contestants _______ 8 different countries. A: overcoming B: representing C: contributing D: justifying