21.×¢Òº5ҺʱÔ
ApHֵı
Bܼɸı
C
DÖ±Ó·Ó¦
E
ο𰸣B
22.Ĵݷʽͬ﷽ԷΪ
AÕ¸
B
C
D
E
ο𰸣BCE
23.̬ҩƼԷΪ
AҺƼ
BҺƼ
CƼ
D΢ɢƼԴ
EƼ
ο𰸣BCE
24.ҩ涨ӲҩˮӦΪ
A2%
B3%
C5%
D9%
E15%
ο𰸣D
25.˾еصΪ
Aж̼ÔÓ£RSĻԽϴ
Bж̼ÔÓ£RRĻԽϴ
Cһ̼ÔӣӳĻһ
Dһ̼ÔÓ£SĻԽϴ
Eһ̼ÔÓ£RĻԽϴ
ο𰸣E
26.̹̹ڻѧṹϵ
AN-вͬȡ
BNвͬȡ
CDzͬ
D̹黷ǻȡ̹
E̹аȡ̹
ο𰸣D
27.û
A鰷H1׿
B鰷H2׿
CӱƼ
DøƼ
EøƼ
ο𰸣C
28.ͱעм60Ŀ
Aͽ糣ʹעҺȶ
BÖ¹Ò©Ë®
CÖ¹Ò©
Dǿʹҩȶ
EÖ¹Ò©Ûº
ο𰸣A
29.14-ҩƳˮǰҩṹεķ
AÉ»
B
C
D
E
ο𰸣B
30.ĻѧΪ
A246-×°
B13-˫2-һ-1-
C14-×»
D5--241H3H-शͪ
E9-2-×»
ο𰸣C

