题干

(1)如图1,请你类比直线和一个圆的三种位置关系,在图1的①、②、③中,分别各画出一条直线,使它与两个圆都相离、与两个圆都相切、与一个圆相离且与另一个圆相交,并在图1的④中也画上一条直线,使它与两个圆具有不同于前面3种情况的位置关系;

(2)如图2,点在直线MN上,AB=11厘米,的半径均为1厘米.以每秒2厘米的速度自左向右运动,与此同时,的半径也不断增大,其半径(厘米)与时间t(秒)之间的关系式为 .请直接写出点出发后多少秒两圆内切?
上一题 下一题 0.0难度 选择题 更新时间:2019-12-28 02:09:22

答案(点此获取答案解析)

同类题5

阅读理解

The CLF Art Cafe, Peckham

    Playing different kinds of music, it has a night to serve most tastes. As one of the leading places for the creative arts, the building is full of friendly but crazy students and young people devoted to having a good time. But for those who aren't interested in making the ceiling sweat, there is an open-air rooftop, monthly plays and regular showings of films.

    Roxy, Fitzrovia

    In the heart of London's shopping center lies one of the flagships for a student night out in London. After showing their Student IDs, students head down into the basement (地下室) of the Roxy where they are thrown into a group of young people from all backgrounds and countries. Whether for a few drinks and a chat or a dance along to the sound of the latest hits, the Roxy's half-priced cocktail (鸡尾酒) will make sure you are satisfied.

    Bar Kick, Shoreditch

    For students who are very busy and have forgotten how to relax, keep yourself focused while you play a game of table football. Put yourself into the crowd of bars and clubs Shoreditch has to offer, Bar Kick presents students with a quiet evening. At street level, it seems like any other bar. Heading downstairs you'll find almost a dozen football tables replacing the dance floor, giving it a competitive edge to an evening away from school work.

    The Court, Tottenham Court Road

    For an affordable meal and drinks on a Sunday before a week of stress, head over to The Court. Combining the perfect combination of traditional pub comforts with student prices, the central London pub offers a quiet place as you catch up with classmates and forget about the stresses of being a student,