25ij˾Ʊ۸涨±УijУ꼶12104ȥιУ1٣50ˣ2϶࣬50ˣ㣬ΪλֱƱһӦ1 240Ԫ Ʊˣ 150 51100 100 ÿƱۣԪ 13 11 9 1жѧ
2Ϊһ幺ƱԽʡǮ
26ij泡ƻס繲6000βÿβ0.5Ԫÿβ0.8ԪϱסijɻʷֱΪ90%95% 1繲3600Ԫס˶β 2Ǯ4200ԪӦѡ磿
3Ҫʹijɻʲ93%ҹܷͣӦѡ磿
2018-2019ѧӱʡػʵ¬꼶£ĩѧԾ
ο
һѡ⣨6С⣬ÿС2֣12֣ 164ǣ
A 8 B 8 C 4 D 4
㣺 ר⣺ ⣮
һxaôxaݴ˶⼴ɣ
⣺464 644 ѡC
ҪһʱӦҳҪһɿǻ㣬ķעһԭʷͬ
2ƽֱϵУ㣨17ڣ
A һ B ڶ C D
㣺 ꣮
ݵһڵص
⣺ߵ㣨17ĺڵһ
ƽֱϵĵһޣ ѡA
Ҫƽֱϵиĵķص㣮ĹؼǼסڵķص㣺һޣ++ڶޣ+ޣޣ+
3Ԫһη
Ľǣ
A B C D
㣺 Ԫһη飮 ר⣺ ⣮
yϵΪ෴üӼԪԪһη⣬Ȼѡ ⣺
+ڵã3x=3 x=1
x=1ٵã1+y=2 y=1 ԣĽ
ѡB
˶ԪһηĽⷨδ֪yϵΪ෴ȷѡüӼԪǽĹؼ
4ͼʽ
Ľ⼯ͬһϱʾȷǣ
A B C
D
㣺 ϱʾʽĽ⼯һԪһβʽ飮
ֱⲻʽóʽĽ⼯ϱʾɣ 𣺽⣺
ٵãx3 ڵãx1
ʲʽĽ⼯Ϊ1x3
ϱʾΪ ѡB
ҪϱʾʽĽ⼯ԼһԪһβʽ飬ȷⲻʽǽؼ
5һ麬60ǵǰACBֱͼãʹǰֱǶCֱߵDEϣCEƽ֡ACB1Ķǣ
A 135 B 60 C 50 D 45 㣺 ƽߵʣ
ݽƽߵʺƽߵʼɵõ𰸣 ⣺ߡACB=90㣬CEƽ֡ACB ECB=45㣬 DEFG
1=ECB=45㣮 ѡD
ƽߵʣƽߵʣЩǽĹؼ
6ͼ33УÿСεı߳ȣӰֵͼ3СɵģdzһͼΪIΣͨƽƻܻͬλõIͼĸǣ
A 1 B 2 C 3 D 4
㣺 ƽͼ
ƽƵʵóƽƷóɣ
⣺ͼʾ123λÿͼΪI
ѡC
ҪƽͼƽƵʵóǽؼ
⣨8С⣬ÿС3֣24֣ 72ƽ
㣺 ƽ