问题
填空题
若⊙O1、⊙O2的半径分别为4和6，圆心距O1O2=8，则⊙O1与⊙O2的位置关系是______．
答案
∵⊙O1、⊙O2的半径分别为4和6，
∴半径和为：4+6=10，半径差为：6-4=2，
∵圆心距O1O2=8，且2＜8＜10，
∴⊙O1与⊙O2的位置关系是：相交．
故答案为：相交．
搜题请搜索小程序“爱下问搜题”
若⊙O1、⊙O2的半径分别为4和6，圆心距O1O2=8，则⊙O1与⊙O2的位置关系是______．
∵⊙O1、⊙O2的半径分别为4和6，
∴半径和为：4+6=10，半径差为：6-4=2，
∵圆心距O1O2=8，且2＜8＜10，
∴⊙O1与⊙O2的位置关系是：相交．
故答案为：相交．
| Teachers need to be aware of the emotional, intellectual, and physical changes that young adults experience. And they also need to give serious (51) to how they can best adapt them selves to such changes. Growing bodies need movement and (52) , but not just in ways that emphasize competition. (53) they are adjusting to their new bodies and a whole host of new intellectual and emotional challenges, teenagers are especially self-conscious and need the (54) that comes from achieving success and knowing that their accomplishments are (55) by others. However, the typical teenage lifestyle is already filled with so much competition that it would be (56) to plan activities in which there are more winners than losers, for example, publishing newsletters with many student-written book reviews, (57) student artwork, and sponsoring book discussion clubs. A variety of small clubs can provide (58) opportunities for leadership, as well as for practice in successful (59) dynamics. Making friends is extremely important to teenagers, and many shy students need the (60) of some kind of organization with a supportive adult barely visible in the background. |
A．assistance
B．guidance
C．confidence
D．tolerance