һx?0С⣬?ÿС\xĿУֻһĿҪģxǰĸڡ
1D41ʾA֧3fֱ
D41
A.A֧P/23f1/2P
B.A֧2P3f0
C.A֧2.5P,3f0
D.A֧P/23f0
E.A֧2P3f1/2P
2ռṹ?
A.ľ?
B.AƸ?
C.?
D.?
3淶涨ݶξ߲Сڣ
A 22mB 2m
C 25mD 27m
4ӡۿС6mrt(y)ˮȲ5mr;ðʽ֙
AŲBpŲ
CβD U֙
5ԟy(tng)ػԟܵˮṹ·ͷȹ̵?
A跨B?
CˮúʯDɰA
6Сrԭ?
AB
CDʡ
7ʩVǰAԤӦʱ̶̨ģϣȻﵽȱֵģAʹA
AW50%BW70%
CW50%DW70%
8ԜՊµ\ڣ
A.ͱ
B.ͱ
C.T
D.Ρ
9ʱֽƷ֡?
ABͬ10%
Cͬ2/3Dȫ?
10ʩĿʩ滮ɣֱƣָĿʵʩ?
AI(y)ȫBĿFι
CĿFιDI(y)ܾȫ
11˷һ㰴䣨˷ȼ
A.
B.
C.ȶ
D.
12ʩDƽDr˨ļ?
A 60mB 80m
C 100mD 120m
13ʹs발úͬZΜúͬZģعȨͬΥԼ⃔
AʹBʹඐ
CʹýDʹDýM
14WwҲĽݱǨݵλ;أԉ?
A`۸BD۸
Cƽ۸D۸M
15ͨӹ̴A㰲ȫʒķֲ̣?λ)ã
A·Bݠ
CӹD
16λպ赥Γ]Ҏ(gu)rV̿йļ
AB(ti)λ
CHаλDlλ
17֪EһGGr14eʱ?eʱ?EH?eʱ?eEr
A 1졡B 2
C 3졡D 4?
18Ʒr
AlλBý赥λ?
CλDƱļ
1960qηxĸ߶_ڣýۡ
A 1/4
B 1/3
C 1/2
D 2/3
20ṹʩա淶(GB502052001)Ĺ涨ǿ˨Ӧ?
A˨СGɼBŤ˨bA
C˨bʩŤؼD˨Ħȹϵʵ顾