14470道相关试题

(2014山东济宁,3)把一条弯曲的公路改成直道,可以缩短路程,用几何知识解释其道理正确的是( )",

A.两点确定一条直线

B.垂线段最短

C.两点之间线段最短

D.三角形两边之和大于第三边

(2013江苏徐州,4)若等腰三角形的顶角为80°,则它的底角度数为( )",

A.80°

B.50°

C.40°

D.20°

(2014河北,12)如图,已知△ABC(AC<BC).用尺规在BC上确定一点P,使PA +PC =BC,则符合要求的作图痕迹是( )http://cdn.vkoimg.cn/content/tk/import/20150929175030/image164.jpg",

A.http://cdn.vkoimg.cn/content/tk/import/20150929175030/image165.jpg

B.http://cdn.vkoimg.cn/content/tk/import/20150929175030/image166.jpg

C.http://cdn.vkoimg.cn/content/tk/import/20150929175030/image167.jpg

D.http://cdn.vkoimg.cn/content/tk/import/20150929175030/image168.jpg

变式(2014内蒙古包头中考)下列实数是无理数的是( )",

A.-2

B.http://cdn.vkoimg.cn/content/tk/import/20150929175005/image045.gif

C.http://cdn.vkoimg.cn/content/tk/import/20150929175005/image046.gif

D.http://cdn.vkoimg.cn/content/tk/import/20150929175005/image047.gif

(2011湖南怀化,1)49的平方根为( )",

A.7

B.-7

C.±7

D.http://cdn.vkoimg.cn/content/tk/import/20150929175044/image070.gif

(2014湖北宜昌中考)如图,M,N两点在数轴上表示的数分别是m,n,则下列式子中成立的是( )http://cdn.vkoimg.cn/content/tk/import/20150929175044/image169.jpg",

A.m+n<0

B.-m<-n

C. http://cdn.vkoimg.cn/content/tk/import/20150929175044/image170.gif<\/b>

D.2+m<2+n

(2014陕西中考)4的算术平方根是( )",

A.-2

B.2

C.http://cdn.vkoimg.cn/content/tk/import/20150929175044/image118.gif

D.http://cdn.vkoimg.cn/content/tk/import/20150929175044/image269.gif

(2014内蒙古赤峰,7)化简http://cdn.vkoimg.cn/content/tk/import/20150929175128/image078.gif,结果正确的是( )",

A.ab

B.-ab

C.http://cdn.vkoimg.cn/content/tk/import/20150929175128/image079.gif

D.http://cdn.vkoimg.cn/content/tk/import/20150929175128/image080.gif

(2013江苏苏州中考)已知http://cdn.vkoimg.cn/content/tk/import/20150929175128/image368.gif,则http://cdn.vkoimg.cn/content/tk/import/20150929175128/image369.gif的值为( )",

A.1

B.http://cdn.vkoimg.cn/content/tk/import/20150929175128/image092.gif

C.http://cdn.vkoimg.cn/content/tk/import/20150929175128/image370.gif

D.http://cdn.vkoimg.cn/content/tk/import/20150929175128/image371.gif

(2014湖南邵阳,6)不等式组http://cdn.vkoimg.cn/content/tk/import/20150929175054/image317.gif的解集在数轴上表示正确的是( )",

A.http://cdn.vkoimg.cn/content/tk/import/20150929175054/image318.jpg

B.http://cdn.vkoimg.cn/content/tk/import/20150929175054/image319.jpg

C.http://cdn.vkoimg.cn/content/tk/import/20150929175054/image320.jpg

D.http://cdn.vkoimg.cn/content/tk/import/20150929175054/image321.jpg