经过直线3x﹣2y+1=0和直线x+3y+4=0的交点，且垂直于直线x+3y+4=0的直线方程为（ ）。
3x﹣y+2=0
Look! Jack and his monkey _________ flying disk together in the garden.
A．is playing
B．was playing
C．are playing
D．were playing
将高级语言编写的程序翻译成机器语言程序，所采用的两种翻译方式是
A．编译和解释
B．编译和汇编
C．编译和链接
D．解释和汇编
