A Bձ CŲ DӢ
18.Ϲ仯רίԱ2000ɵδ100̼ŷ龰ķȫŷųƣҪԴЩҵ̼ŷţ B
A Bչй C Dŷ
19.йɡʮһ塱20%ĽĿ꣬ͨܺһڿɽʡԴC ֱú
A4.5ڶ B5.5ڶ C6.2ڶ D6.5ڶ
20.ŷCDMңռÿCDMȽģ D
A50% B60% C70% D75%
2.ѡ⡾20⡿
1.ϵͳУ ABCD
AȦ BѩȦ CȦ DˮȦ
2.ҹѭõķչģʽ漰صǣAC
A Bת C D
3.̼еĽ벻̼Ԫչ̼ҪӣAB ȷ֡
A B CӪ D
4.̼ξָڿɳչָ£ͨABCD ȶֶΣܵؼú̿ʯ͵ȸ̼Դġ
A Bƶȴ Cҵת DԴ
5.ҹѭ÷չҪϰУABCD
Aϰ Bϰ Cϰ Dƶϰ
6.йҹڵ̼ñµIJҵṹȷǣ ABC
AҪӴ̼ҵȣʵָ̼ҵ̼ BҪƶƲҵߣӿ˵̼ҵķչ CҪӴзͶ
DΪ˱֤ҹľø̼ҵϺչ 7.һ㻷Ļصǣ ABCD
A B㷺 CDZ Dۻ
8.˫ϵͳѭģʽУ˫ϵͳָAB
Aϵͳ Bϵͳ C̬ϵͳ Dϵͳ
9.йԷչǣ ABCD
AùӦ Bȷԭ Cƿԭ
Dҵչ
10.̼ѷʽҪע5AABCD
A֪ B Cɲ Dɳ
11.̼á̬dzַչABCD
A⾭ Bܾ Cܾ D̬
12.ɭּٵӰΣУABCD
A쳣 BӶ̼ŷ
CԼ DӾˮʴ
13.̼÷չƵĹ ABCD