若一次函数y=kx+b的图象经过一、三、四象限,则k,b应满足( )
A:k>0,b>0
B:k>0,b<0
C:k<0,b>0
D:k<0,b<0
下列各句中,划线的成语使用恰当的一句是( )
Hello, I'm Jack. I am a student. I have many friends at school. I go to school by bus; the school is near my home. Tom goes to school by bike. John goes to school by car. His mother drives(驾驶) the car. Mary goes to school by taxi. We are happy at school.
某乡人大换届选举中,个别选民贪图“小恩小惠”而“卖掉”选票的事实警示我们( )
①要严格执行《村民委员会组织法》的有关规定
②要切实提高广大选民对行使自己的民主权利重要意义的认识
③要引导选民正确行使自己的民主权利
④要切实转变政府职能,解决好各级领导干部的思想认识问题