在社会治安问题上，应把人民群众当作主人，而人民警察是士与公仆。( )
参考答案：对
销售商品未收到款项也可以确认其为收入。（）
To ______ good relationships with your teachers and classmates, you should learn to share ups and downs with them.
A．bring up
B．add up
C．keep up
D．take up
