Speak louder, please! I can ____ hear you.
A:easily
B:hardly
C:usually
芜湖地处长江中下游,水资源丰富,素有“江南水乡”之美称.据测量,仅浅层地下水蕴藏量就达56000万m3,用科学记数法记作 ( )
先化简,再求值:( x2+xx2−1−11−x ) ÷(x2+3xx−1−1) ,其中x=2.
已知点A(-3,2),B(3,2),则A,B两点相距( )