42ѹҪصǣ
AˮС
B Ժ
C ˮȸ
D Դ
43ʩ֯ƵĽͳɱָָ
Aͳɱʣͳɱܶ/аɱܶ*100
B ͳɱʣƻɱ/Ŀɱ*100
C ͳɱʣͳɱ/Ŀɱ*100
D ͳɱʣͳɱ/ʵʵͳɱ*100
44ṹϵƷԵĹϵǣ
Aͬ䶯
B䶯
C
Dȷ
45ͬĶҪҪԼͳŵΣҹͬĹ涨ҪԼͳŵЧָ
AҪԼҪԼ ŵ֪ͨ
BҪԼ֪ͨ ŵ֪ͨ
CҪԼ֪ͨŵ֪ͨҪԼ
DҪԼҪԼˡŵ֪ͨҪԼ
46ƽ
AͼʾߴԽײ
BͼʾߴԽײһ
CͼʾߴԽײ2m
Dʦǩʩ֯Ƶʹ
48ס¥ݶε̤һ㲻˳
A8
B10
C12
D18
49Ŀǰõʩǣ
AAֳ彽
B֧ʩ
C֧ʩ
DԤװ
50ڣ
Aлϡ
B
Cϲ
Dǽ
51ʽ̨Ϊ1.5ףѹǽڵijӦԼΪ
A1.0
B 1.5
C 1.8
D 2.4
52ʯвڴҵϴصǣ
Aҡ
Bɰҡ
CʯӢҡ
Dʯ