11.ij(xing)ĿͶa(chn)a(chn)ֵ1.5|ԪͬI(y)İԪa(chn)ֵ(dng)Yռ~17.5Ԫtԓ(xing)Ŀ䁵(dng)Y( )fԪ
A.2625
B.787.5
C.4500
D.262.5
𰸣B
12.úҪǞ˱⣺
A.̕r(sh)W(xu)տsl(f)ѿp
B.Y(ji)(gu)ضտsl(f)ѿp
C.Y(ji)(gu)ʩr(sh)ʩp
D.Û
𰸣B
13.ʩ|(zh)}r(sh)ؓ(f)؟(z)Qǣ
A.ʩλ
B.O(sh)Ӌ(j)λ
C.O(sh)λ
D.O(jin)λ
𰸣B
14. ͻ≦Ę(gu)ˇg(sh)beӋ(j)Ҏ(gu)tǣ
A.ˮƽͶӰeӋ(j)
B.ˮƽͶӰe1/2Ӌ(j)
C.ˮƽͶӰe1/4Ӌ(j)
D.Ӌ(j)㽨e
𰸣D
15. ɰ{(yng)SĨSʩgߚس^30r(sh)ˮɰ{t(yng)ڶL(zhng)r(sh)g(ni)ʹꮅ?
A.2h
B.3h
C.4h
D.5h
𰸣A
16. ϲĻbҎ(gu)ǣ
A.Ļͺָ(yng)O(sh)Ӌ(j)Ҫ
B.ĻķbñcwY(ji)(gu)ķbÿɿB
C.ĻM(jn)߅̎
D.ĻIJc(gu)ֱӽ|
𰸣C
17. ʩSC( )Ո(qng)I(lng)ȡ?
A.O(sh)λ
B.ʩλ
C.O(sh)Ӌ(j)λ
D.O(jin)λ
𰸣A
18.bbO(sh)Ӌ(j)漰wͳؽY(ji)(gu)Ą(dng)Ӻdr(sh)(yng)( )˲P(gun)ԭʼY(du)нY(ji)(gu)İȫM(jn)к(yn)_J(rn)
A.ԭY(ji)(gu)O(sh)Ӌ(j)λ߂(yng)Y|(zh)O(sh)Ӌ(j)λ
B.ԭO(sh)Ӌ(j)λ
C.ԭʩλ
D.ԭO(sh)λ
𰸣A
19. һNrˮƽͶӰe1/2Ӌ(j)㽨e?
A.ýĿgƽ_(ti)
B.ӸС2.2mA(ch)¼ܿՌ
C.Ҫͨɢ
D.ǃ(ni)Иݵ
𰸣D
20.ʹÙ(qun)ͬij( )
A.(gu)(w)Ժ
B.ʡʡ
C.к
D.hͿh
𰸣D