2.ѡ⡿̼ܰʯȦͷų; (A)
A ɽ緢 B ֲʴ C 绯 D ؿ˶
3.ѡ⡿ˮȦˮȦʯȦ֮ѭ (C) ڡ
A 4 B 5 C 6 D 7
4.ж⡿ҵϸķͷųĵᱻɫֲա ( )
5.ж⡿ظԭĵشԳͬĻ״ֲ
()
13.3 Ȧγɡֲ
1.ѡ⡿ ,ռ (D)ҡ A 7% B 11% C 23% D 38%
2.ѡ⡿ԭĵҪֲ (C)
A ԭȻشӱԵڲ ,ԵĶϵ
B ֮ͬγȵĵͺȻش
,ԭشƫص
C ԭشͬγȵͺȻشȫͬ D ɽشֱˮƽڴֱϵı ,ԭˮƽȴɽشֱھ߳ϵˮƽ
3.ѡ⡿IJβ
(D)
ѡ
A ֳʲ B ܲ C D ʲ
4.ж⡿еĶ̼ĺԵⲿж̼ĺ ( )
5.ж⡿ʯ绯ͳ
( )
13.4 Ȧ뿦˹صò 1.ѡ⡿ ,Ӱĸʡ͵صǿȺ
η (D) A B C D ʱ
2.ѡ⡿Ҷֵһ (C)
A ڸ B C һ D
3.ѡ⡿ͨγɽϺ (A) A B C D ظ
4.ж⡿ҹϲ˹صòҪʯ̼ҡ
()
ѡ
,
5.ж⡿ֻҪзʯ ,γɿ˹صòЩγڵ ,
Щγڵ¡ ( )
13.5 ˹صò
1.ѡ⡿կˮϵӴγҪ (A)
A B ̼ C þ D ͭ
2.ѡ⡿·ʯҪ (C)
A ʯӢ B C ʯ D
3.ѡ⡿˹صòеŵγҪ (D)
A ˮʴ B ʴ C ʯ D ¶Ѩı
4.ж⡿ԺͷֵҪǵĻǷһġ 5.ж⡿ʯʯǰ߰ķΧ
()
14.1 ر 1.ѡ⡿±෨ ,C ָ (C)
A ȴ B ɺ
ѡ
)
(C ů D ´
2.ѡ⡿¹ѧҿ±رֳ (C)
A 4 B 5 C 6 D 7
3.ѡ⡿ ,Ͼߵ (C) A
B Ĵϲ C D ޱ
4.ж⡿һ˵ ,кľʿԴﵽ 5.ж⡿кʪصȫ¶ꡣ
( )
14.2 òʡˮԴ 1.ѡ⡿ijһĵ (B),Ͳ
A 100 B 500 C 800 D 1000
2.ѡ⡿е ,ԪȱΪصĵ (B)
A ̨ B C D
ѡ
600-800 ( )