本课配套习题挑战模式1/5
单选题
难度系数:
1.两个半径不等的圆相切,圆心距为6cm,且大圆半径是小圆半径的2倍,那么小圆的半径为( )
A: 3cm |
B: 4cm |
C: 2或4cm |
D:2或6cm |
一次做对,真牛!
+5奖励规则>
- 提示1:IOeUseWkp+WchuWNiuW+hOaYr+Wwj+WchuWNiuW+hOeahDLlgI3vvIzlj6/orr7lsI/lnIbljYrlvoTkuLpyY23vvIzliJnlpKflnIbljYrlvoTkuLoycmNt77yM5Y+I55Sx5Lik5Liq5Y2K5b6E5LiN562J55qE5ZyG55u45YiH77yM5ZyG5b+D6Led5Li6NmNt77yM54S25ZCO5YiG5Yir5LuO5Lik5ZyG5aSW5YiH5LiO5YaF5YiH5Y675YiG5p6Q5rGC6Kej5Y2z5Y+v5rGC5b6X562U5qGILg==
- 答案:RA==
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
本课配套习题挑战模式2/5
单选题
难度系数:
2.定圆O的半径是4cm,动圆P的半径是2cm,动圆在直线l上移动,当两圆相切时,OP的值是( )
A: 2cm或6cm |
B: 2cm |
C: 4cm |
D: 6cm |
一次做对,真牛!
+5奖励规则>
- 提示1:IOWumuWchk/kuI7liqjlnIZQ55u45YiH5pe277yM5YiG5Lik56eN5oOF5Ya16ICD6JmR77ya5YaF5YiH5LiO5aSW5YiH77yM5b2T5Lik5ZyG5YaF5YiH5pe277yM5ZyG5b+D6LedT1A9Ui1y77yb5b2T5Lik5ZyG5aSW5YiH5pe277yM5ZyG5b+D6LedT1A9Uity77yM5rGC5Ye65Y2z5Y+vLg==
- 答案:QQ==
6Kej562U77ya6K6+5a6a5ZyGT+eahOWNiuW+hOS4ulI9NGNt77yM5Yqo5ZyGUOeahOWNiuW+hOS4unI9MmNt77yMPGJyPuWIhuS4pOenjeaDheWGteiAg+iZke+8mjxicj7lvZPkuKTlnIblpJbliIfml7bvvIzlnIblv4Pot51PUD1SK3I9NCsyPTZjbe+8mzxicj7lvZPkuKTlnIblhoXliIfml7bvvIzlnIblv4Pot51PUD1SLXI9NC0yPTJjbe+8jDxicj7nu7zkuIrvvIxPUOeahOWAvOS4ujJjbeaIljZjbS4gPGJyPuaVhemAiUE=
本课配套习题挑战模式3/5
单选题
难度系数:
3.如图,圆A、圆B的半径分别为4、2,且AB=12. 若作一圆C使得三圆的圆心在同一直在线,且圆C与圆A外切,圆C与圆B相交于两点,则下列何者可能是圆C的半径长( )
A: 3 |
B: 4 |
C: 5 |
D: 6 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOmmluWFiOaJvuWIsOS4gOS4quWchuWSjOWchkHlkozlnIZC6YO95aSW5YiH77yM5rGC5Ye66K+l5ZyG55qE5Y2K5b6E77yM54S25ZCO5YaN5om+5Yiw5ZyGQ+WSjOWchkHlpJbliIflkozlnIZC55u45YaF5YiH5pe277yM5ZyGQ+WNiuW+hOeahOWPluWAvC4=
- 答案:Qg==
6Kej562U77ya5b2T5ZyGQ+WSjOS4pOWchumDveWkluWIh+aXtu+8jDxicj7moLnmja7popjmhI/miJHku6zlj6/nn6XlnIZD55qE5Y2K5b6Ecj0z77yMPGJyPuW9k+WchkPlkozlnIZB5aSW5YiH5ZKM5ZyGQuebuOWGheWIh+aXtu+8jDxicj7lnIZD55qE5Y2K5b6Ecj0177yMPGJyPuaVheWchkPkuI7lnIZB5aSW5YiH77yM5ZyGQ+S4juWchkLnm7jkuqTkuo7kuKTngrnvvIw8YnI+5ZyGQ+eahOWNiuW+hOWPluWAvOiMg+WbtOS4ujPvvJxy77ycNe+8jDxicj7mlYXpgIlCLiA=
本课配套习题挑战模式4/5
单选题
难度系数:
4.图,已知⊙O1的半径为1cm,⊙O2的半径为2cm,将⊙O1,⊙O2放置在直线l上,如果⊙O1在直线l上任意滚动,那么圆心距O1O2的长不可能是( )
A: 6cm |
B: 3cm |
C: 2cm |
D: 0.5cm |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruWcqOa7muWKqOeahOi/h+eoi+S4reS4pOWchueahOS9jee9ruWFs+ezu+WPr+S7peehruWumuWchuW/g+i3neeahOWFs+ezuy4=
- 答案:RA==
6Kej77ya4oi14oqZTzxzdWI+MTwvc3ViPueahOWNiuW+hOS4ujFjbe+8jOKKmU88c3ViPjI8L3N1Yj7nmoTljYrlvoTkuLoyY23vvIw8YnI+4oi05b2T5Lik5ZyG5YaF5YiH5pe277yM5ZyG5b+D6Led5Li6Me+8jDxicj7iiLXiiplPPHN1Yj4xPC9zdWI+5Zyo55u057q/bOS4iuS7u+aEj+a7muWKqO+8jDxicj7iiLTkuKTlnIbkuI3lj6/og73lhoXlkKvvvIw8YnI+4oi05ZyG5b+D6Led5LiN6IO95bCP5LqOMe+8jDxicj7mlYXpgIlELiA=
本课配套习题挑战模式5/5
单选题
难度系数:
5.如图,⊙O1,⊙O2的圆心在直线l上,⊙O1的半径为2cm,⊙O2的半径为3cm. O1O2=8cm,⊙O1以1cm/s的速度沿直线l向右运动,7s后停止运动. 在此过程中,⊙O1和⊙O2没有出现的位置关系是( )
A: 外切 |
B: 相交 |
C: 内切 |
D: 内含 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruS4pOWchueahOWNiuW+hOWSjOenu+WKqOeahOmAn+W6puehruWumuS4pOWchueahOWchuW/g+i3neeahOacgOWwj+WAvO+8jOS7juiAjOehruWumuS4pOWchuWPr+iDveWHuueOsOeahOS9jee9ruWFs+ezu++8jOaJvuWIsOetlOahiC4=
- 答案:RA==
6Kej77ya4oi1TzxzdWI+MTwvc3ViPk88c3ViPjI8L3N1Yj49OGNt77yM4oqZTzxzdWI+MTwvc3ViPuS7pTFjbS9z55qE6YCf5bqm5rK/55u057q/bOWQkeWPs+i/kOWKqO+8jDdz5ZCO5YGc5q2i6L+Q5Yqo77yMPGJyPuKItDdz5ZCO5Lik5ZyG55qE5ZyG5b+D6Led5Li677yaMWNt77yMPGJyPuatpOaXtuS4pOWchueahOWNiuW+hOeahOW3ruS4uu+8mjMtMj0xY23vvIw8YnI+4oi05q2k5pe25YaF5YiH77yMPGJyPuKItOenu+WKqOi/h+eoi+S4reayoeacieWGheWQq+i/meenjeS9jee9ruWFs+ezu++8jDxicj7mlYXpgIlELiA=