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【简答题】
在Rt△ABC中,∠C=90°,AC=6,BC=8,点O在CB上,且AO平分∠BAC,CO=3(如图所示),以点O为圆心,r为半径画圆. (1)r取,⊙O与AB相切; (2)r取,⊙O与AB有两个公共点; (3)当⊙O与AB相切时,设切点为D,在BC上是否存在点P,使△APD的面积为△ABC的面积的 一半?若存在,求出CP的长;若不存在,请说明理由.
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参考答案:
举一反三
【单选题】DAP上EMER按钮的功能:()
A.
应急情况呼叫乘务员,连接MIC信号并预位语音输入
B.
应急呼叫地面人员
C.
应急呼叫旅客
D.
都不对
【单选题】DAP上EMER按钮的功能:()。
A.
应急情况呼叫乘务员,连接MIC信号并预位语音输入
B.
应急呼叫地面人员
C.
应急呼叫旅客
【单选题】What must be enabled to view the WAN performance reports?()
A.
Monitor > WAN > WAN Throughput
B.
Monitor > WAN > WAN Performance
C.
Device Setup > Applications > Monitoring
D.
Device Setup > Advanced > WAN Performance Monitor
【单选题】-You didn’t  look well. You’d better see the doctor -I . But the doctor said there was nothing serious. [     ]
A.
have
B.
am
C.
will
D.
was
【简答题】A.LAN和WAN B.用户和用户 C.LAN和LAN D.WAN和WAN
【单选题】EMER被按下后,所有扬声器响起()
A.
高谐音
B.
低谐音
C.
高/低谐音
【单选题】“Well, I’ll tell you a secret ...” said the boy, with his mouth almost _____ my ear.
A.
touched
B.
touching
C.
touch
D.
to touch
【单选题】--- What should I do with my paper, Mr. Jason?   --- Well, what I have said about Peter’s _____ yours. [     ]
A.
goes for
B.
goes through
C.
goes up
D.
goes over
【多选题】意识对物质的反作用表现为( )。
A.
反映客观世界
B.
创造客观世界
C.
通过实践改造客观世界
D.
影响主体的生理过程和活动
E.
完整地再现客观世界
【单选题】— You don't look well. You'd better see the doctor. — I ______. But the doctor said there was nothing serious. [     ]
A.
have
B.
am
C.
will
D.
was
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