()4.(2015•梅州)WorldReadingDayisApril23.It'sspecialdaythatwasfoundedin1995bytheUN.A.on;aB.in;aC.on;anD.in;/
() 4. (2015 •梅州) World Reading Day is April 23. It's special day that was founded in 1995 by the UN.
A. on;a B. in;a C. on;an D. in;/
已知球O的半径为4,圆M和圆N为该球的两个小圆,AB为圆M和圆N的公共弦,AB=4,若OM=ON= 2020-07-11 …
如图所示,O的半径为13,弦AB的长度是24,ON⊥AB,垂足为N,则ON=()A.5B.7C.9 2020-07-17 …
如图,O为矩形ABCD的中心,将直角三角板的直角顶点与O点重合,转动三角板使两直角边始终与BC,A 2020-07-18 …
如图,∠MON=90°,矩形ABCD的顶点A、B分别在边OM、ON上运动,且形状和大小保持不变,其 2020-07-24 …
已知球O的半径为4,圆M与圆N为该球的两个小圆,AB为圆M与圆N的公共弦,AB=4,若OM=ON= 2020-07-24 …
(2014•防城港二模)已知球O的半径为4,圆M与圆N为该球的两个小圆,AB为圆M与圆N的公共弦, 2020-07-29 …
1.已知圆O的半径为1,PA,PB为该圆的两条切线,A,B为两切点,那么向量PA乘向量PB的最小值 2020-08-01 …
()1.Thereisappleandpearonthetable.A.an,aB.an,anC.a 2020-10-29 …
()4.(2015•梅州)WorldReadingDayisApril23.It'sspeciald 2020-11-12 …
(28g4•德阳)如你,⊙On,wG、AC是直径,AB是弦,wG⊥AB,垂足为点P,过点C6直线交A 2020-11-12 …