11.סլУһr(yng)_(ti)Ļdȡֵ҃(ni)Ļdȡֵ( )
A.
B.С
C.ͬ
D.(yng)_(ti)Rքttͬ
𰸣A
12.Ϗ(qing)ȵĘ(bio)(zhn)ֵȡ( )_,rܵĘ(bio)(zhn)ֵ( )_
A.ʷֲ0.05λֵ;ʷֲ0.05λֵ
B.ʷֲ0.5λֵ;(j)ԭλy(c)ԇ҃(ni)ԇ(yn)ĽY(ji)
C.ʷֲ0.05λֵ;(j)ԭλy(c)ԇ҃(ni)ԇ(yn)ĽY(ji)
D.ʷֲ0.5λֵ;ʷֲ0.5λֵ
𰸣C
13.(xing)ʩ(du)䓽spgo(w)Ч( )?
A.ڜض׃Ӱ^IJλ
B.üܿͨL(fng)
C.픲O(sh)ֲضȿp
D.ӏ(qing)픲njӵĄ
𰸣D
14.҇(gu)dҎ(gu)Ҏ(gu)ĻL(fng)Ԯ(dng)?sh)ر^Օƽ̹ĵx10m߽y(tng)Ӌ(j)õĶһ10minƽL(fng)ٞ(bio)(zhn)_( )
A.10
B.20
C.30
D.50
𰸣D
15.lr䓽ܽY(ji)(gu)spg䓽Y(ji)(gu)( )
A.
B.С
C.ͬ
D.ܿ϶
𰸣A
16.(du)ڳdOޠB(ti)O(sh)Ӌ(j),(yng)]Y(ji)(gu)Ч(yng)M,( )
A.MϺ͘(bio)(zhn)M
B.(bio)(zhn)MϺżȻM
C.MϺżȻM
D.־àB(ti)żȻB(ti)
𰸣C
17.vصwݣm(li)еĎ(li)?
.סլ;.k;.̈(chng);.̌W(xu)
A.
B.
C.
D.
𰸣C
18.gǰY(ji)(gu)׃λs׃εԭ( )
A.L(fng)
B.տs
C.
D.L(fng)տs
𰸣B
19.uߴ24011553(mm)F(xin)дu2.78t(wn)Ӌ(j)u(sh)ىK( )?
A.800
B.900
C.1000
D.1100
𰸣C
20.һƽľd(bio)(zhn)ֵ( )
A.0.5kN/O
B.0.7kN/O
C.2.0kN/O
D.2.5kN/O
𰸣C