act考试真题及答案.doc

act考试真题及答案

一、单项选择题（每题2分，共10题）

1.Whichofthefollowingisaprimenumber?(A)4(B)9(C)7(D)15

答案：C

2.Thesolutionoftheequation2x+5=13is(A)4(B)-4(C)9(D)-9

答案：A

3.Inarighttriangle,ifonelegis3andthehypotenuseis5,theotherlegis(A)4(B)6(C)2(D)8

答案：A

4.Whichofthefollowingfunctionshasagraphthatisaparabola?(A)y=3x+2(B)y=x^2+2x-3(C)y=1/x(D)y=sin(x)

答案：B

5.Iftheradiusofacircleis4,itsareais(A)16π(B)32π(C)8π(D)64π

答案：A

6.Thesumoftheinterioranglesofatriangleis(A)90°(B)180°(C)360°(D)270°

答案：B

7.Whichofthefollowingisequivalentto3/5?(A)6/10(B)9/15(C)12/20(D)Alloftheabove

答案：D

8.Ifalinehasaslopeof2andpassesthroughthepoint(1,3),itsequationis(A)y=2x+1(B)y=2x-1(C)y=2x+3(D)y=2x-3

答案：A

9.Thecuberootof27is(A)3(B)9(C)-3(D)-9

答案：A

10.Whatisthemedianofthenumbers3,5,7,9,11?(A)7(B)8(C)6(D)9

答案：A

二、判断题（每题2分，共10题）

1.Thesquarerootof16is4and-4.(True/False)

答案：True

2.Arectangleisalwaysasquare.(True/False)

答案：False

3.Thesumoftwooddnumbersisalwaysanoddnumber.(True/False)

答案：False

4.Ifab,then-a-b.(True/False)

答案：True

5.Thefunctiony=k/x(k≠0)isalinearfunction.(True/False)

答案：False

6.Allequilateraltrianglesaresimilar.(True/False)

答案：True

7.Theproductofapositivenumberandanegativenumberispositive.(True/False)

答案：False

8.Zeroisanaturalnumber.(True/False)

答案：False

9.Apolynomialofdegree3hasatmost3roots.(True/False)

答案：True

10.Thecosineof0°is1.(True/False)

答案：True

三、填空题（每题2分，共10题）

1.Thevalueof2^3is_.

答案：8

2.Iff(x)=x^2-1,thenf(3)=_.

答案：8

3.Theperimeterofasquarewithsidelength5is_.

答案：20

4.Theslope-interceptformofalineisy=mx+b,wheremisthe_andbisthe_.

答案：slope;y-intercept

5.Thecommonratioofthegeometricsequence2,4,8,16...is_.

答案：2

6.Ina30-60-90tria