2018-2019ѧɽʡ̩̩а꼶£ĩ
ѧԾѧƣ
һѡ⣨12С⣬48.0֣ 1. зһԪη̵ǣ
A. x+2y=1
2. ֪
B. x2=1
ڣ
C. x2=8 D. xx+3=x2-1
A. B. C. 2 D. 3
3. ͼֱl1l2l3ֱACֱֱl1l2l3ڵAB
CֱDFֱֱl1l2l3ڵDEFֱACDFڵPн۴ǣ
A. = B. = C. = D. =
ACBDཻڵO4. ͼıABCDУBAD=90㣬
BO=DOôһԲжıABCDǾεǣ
A. ABC=90
B. BCD=90
C. AB=CD D. ABCD
5. ֪xһԪηx2-2kx+6=0ȵʵkֵΪ
2 A. B. C. 23 D.
6. 2018һȣΪij۹˾Ӫ2017ͬ22%2019һ
Ӫ2018ͬ30%20182019һӪƽΪxз̣ A. 2x=22%+30% B. 1+x2=1+22%+30% C. 1+2x=1+22%1+30% D. 1+x2=1+22%1+30% 7. y=
壬xȡֵΧǣ
A. xx0 B. x C. x B. |2-D. -=2-
D. x0
8. еʽһǣ A. -=
C.
=-4
1ҳ15ҳ
9. ǰѿ볤ıֵڻƽľγΪƽΣͼڻƽ
ABCDABBCıABȡһEʹBE=BCDEڣ
A.
B.
C.
D.
10. йŴѧרǡ㾭ʮ顱ֵ֮ʮ飩Ҫһ֣⣺ط֪СпţŰʮľŶʮ岽ľطмΣ˼ǣͼMNֱABCDıADABе㣬MEADNFABEFAME=80NF=245εı߳Ϊ A. 280 B. 140 C. 300 D. 150
11. ͼʾABCDУGΪCDе㣬AGӳBCߵӳ
E㣬ԽBDAGF㣮֪FG=2߶AEijΪ
A. 6 B. 8 C. 10 D. 12
12. ͼABCDУEFHֱABBC
CDе㣬CEDFGAGHGнۣ
CEDFAG=ADۡCHG=DAGHG=CEȷУ A. 1 B. 2 C. 3 D. 4
⣨6С⣬24.0֣ 13. 㣺?
£=______
14. xһԪηax2+2ax+c=0һ0ʱ̵һ______
2ҳ15ҳ
15. ͼ߶AB˵ֱΪA2.55B
50ԭΪλģ߶ABСõ
0CDDΪ2CΪ______
16. ͼֱΣֱDZߣΪ5ɣֱDZߣ
Ϊ12ʸֱɵͼʾCEDF߳Ƕ٣Ĵ______ 17. ԱϿһëר꣬ƽÿ20ÿӯ40Ԫÿ1Ԫÿɶ5ÿҪӯ1700ԪÿӦ
______ԪҪÿ۷Ȳ15Ԫ
18. ͼABCDı߳Ϊ6EFֱڱABBCϣ
FBCе㣬ҡEDF=45㣬BEijΪ______
⣨1С⣬10.0֣ 19. ̣ⷽ
1x2+5=2x 23x2-13x+14=0
ġ⣨6С⣬68.0֣ 20.
14
--2
y=2+
x2+xy+y2ֵ
2֪x=2-
3ҳ15ҳ
21. ֪xһԪηx2-m+3x+m+2=0
1֤ʵ
2ľֵȣʱmֵ
22. ͼACBDཻڵOOACBD
㣬EıABCD⣬ҡAEC=BED=90㣬֤ıABCDǾΣ
23. ͼABCDE۵ʹCǡABߵ
еCϣDD䴦CD佻AEڵMAB=6BC=9߶AMij
24. о̩ǹ˾65סֲƷÿÿ2ײƷ1
ҲƷгãײƷÿɻ15ԪҲƷÿɻ120ԪʵУҲƷҪ֧һķã㣬ÿ1ҲƷÿҲƷƽ2Ԫÿ찲xҲƷ 1Ϣ
Ʒ ÿ칤ˣ ÿ ÿƷɻ 4ҳ15ҳ