-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193917983724754/SYS201311011939179837247010_ST/0.png)
的绝对值是
;-1.5的相反数是
;
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193917983724754/SYS201311011939179837247010_ST/1.png)
的算术平方根是
.
考点分析:
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如图,PA、PB是⊙O的两条切线,A、B为切点,直线OP交⊙O于C、D,交AB于E,AF为⊙O的直径,下列结论:①∠ABP=∠AOP;②
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;③PC•PD=PE•PO.其中正确结论的个数有( )
A.3个
B.2个
C.1个
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如图,已知一渔船上的渔民在A处看见灯塔M在北偏东60°方向,这艘渔船以28海里/时的速度向正东方向航行,半小时后到达B处,在B处看见灯塔M在北偏东15°方向,此时灯塔M与渔船的距离是( )
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当k<0时,函数y=k(x-1)与y=
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A.
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下列说法中,错误的是( )
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下列结论,正确的是( )
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ab
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