【附5套中考模拟试卷】河南省许昌?019-2020学年中考数学第二次押题试卷含解?- 百度文库 ر

ʡ2019-2020ѧпѧڶѺԾ

һѡ⣨⹲12С⣬ÿС4֣48֣ÿСĸѡУֻһǷĿҪģ 13671729λֱǣ A17

B19

C67

D69

2tan30ֵΪ A

B

C

D

?һ㣬DF??BC?CFӳADӳ3ͼıABCDڽڡOFCDEACABC=105㣬BAC=25㣬EĶΪ

A45 B50 C55 D60

4ͼRtAOBУAOB=90㣬OAxϣOByϣABֱΪ3001RtAOBAB۵õRtAOBOΪ

A

3522B33 22C235 32D433 3252018괺ˣȫÿͷ29.8˴Σÿѧʾ29.8ڣȷǣ A29.8109

B2.98109

C2.981010

D0.2981010

6ijУ꼶࣬ѡ10ѧμѧУеġʫʡѡֳɼݷʾжϴǣ ༶ ˣ1 ƽ 94 λ 93 94 12 ˣ2 95 95.5 93 8.4 Aˣ2ָܷڰˣ1 Bˣ2ijɼȰˣ1ȶ C߷ڰˣ2 Dˣ2ijɼ

7ʡ2013ĿҵΪ12ڼڵչͷλƵȶأҵѸͷչ2012λȫһ2015Ŀҵﵽ25ڼ20122013ƽΪxзȷǣ A121x25 B1212x25 C121x225

D121x121x225

8СС·˿AdzʻBǣʻУСС·˳뿪Aǵľy(km)ʻʱt(h)֮ĺϵͼʾнۣAB300 kmС·ijСij1 hȴ絽1 hС·ij2.5 h׷СijܵСС·ij50 kmʱt

515t.ȷĽ( )

44

A٢ڢۢ C٢

B٢ڢ Dڢۢ

9xһԪηx2?2x?kb?1?0ȵʵһκ

y?kx?bͼ:

A B C

D

10ABCסABC䣬A=40㣬C=110㣬Bڣ A30 11?B50

C40

D70

1෴ 3B?

A

1 313C3 D-3

12ij2017ֵGDP201612%ܵʽΣӰ죬Ԥ201820177%GDPƽΪx%x%Ĺϵǣ A12%?7%?x% C12%?7%?2x%

B(1?12%)(1?7%)?2(1?x%) D(1?12%)(1?7%)?(1?x%)2

⣺⹲6С⣬ÿС4֣24֣

13xһԪη̣a1x2x+1=0ʵaȡֵΧΪ________ 14֪xx23x+a=0һΪ1򷽳̵һΪ_____

15ͼYABCDУAB=8PQΪԽACȷֵ㣬ӳDPABڵMӳMQCDڵNCN=__________

16ͼıABCDУACBDǶԽߣAC=ADBCABABCDAB=4BD=2tanBAC=3

߶BCij_____

17BCཻEFͼy=x0ͼAOBCAC֪OA=38OB=4ECFΪkֵΪ_____

3kx

ace18??=kb+d+f0a+c+e=3b+d+fôk=_____

bdf⣺⹲9С⣬78֣Ӧд˵֤̻㲽裮

196֣Ϊ˽ijɫСʽijУѧȤСʾʽijвֳҪзʽʾֻѡһࣩƳ²ͳͼ A B C D E зʽ ʿ ˽ҳ

Ϣش⣺

1뱾ʾ ˣѡB ˣ 2ͳͼУAӦԲĽǦĶȫͳͼ

3Լ12˳УABCзʽΪɫСʽƸСɫСʽ

206֣ڡABCУABACABΪֱġOACڵEBCڵDPΪACӳһ㣬ҡPBC

1BACDEBE 25AB10BPij 51֤BPǡOߣ 2sinPBC

2?1oo0216֣㣺()?2sin60?1?tan60?(2019??) ̣ⷽ4x(x?3)?x?9

12228֣1̣ⷽx24x3=0 2ⲻʽ飺

238֣ƽֱϵУ֪߾A(30)B(03)C(10). (1)ߵĽʽ

(2)MΪһ㣬MĺΪmAMBΪS.S mĺϵʽSֵ

(3)PϵĶ㣬Qֱy=xϵĶ㣬жмλܹʹõPQBOΪ