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2020·⹤ʦԡ·̡ģ:

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1[.ѡ]¸ֶУ()һڳϸ

A.

B.

C.ض

D.˾ƿ˹

[]D

[]˾ƿ˹һѧʽһڳϸ

2[.ѡ]ֲϲöӦͨ10%30%60%ֱΪ0.0042mm0.0065mm0.0112mmϵΪ()

A.Cc=0.90

B.Cc=1.92

C.Cc=3.92

D.Cc=2.05

[]A

[]ϵļ㹫ʽCc=d302/(d10d60)=0.90

3[.ѡ]ϸΪ5%~15%(15%)()

A.ϸ

B.

C.ϸ

D.

[]A

[]ϸΪ5%~15%(15%)ƺϸΪGF

4[.ѡ]лУλͼAϣB߻BҵΪ()

A.лʸҺ޷

B.лʵҺ޷

C.лʸҺ

D.лʵҺ

[]C

[]λͼAϣB߻BңлʸҺ

5[.ѡ]()ʺҺܷп

A.0.075mm

B.С0.075mm

C.С0.075mmұش

D.0.25mm

[]C

[]JTG E40-2007P84˵ҺܷС0.075mmұش

7[.ѡ]֪ijҺWLΪ35.6%ָIpΪ20.9%ȻˮwΪ31.2%ȻΪ()

A.Ȼ=0.21

B.Ȼ=0.31

C.Ȼ=0.54

D.Ȼ=0.36

[]A

[]ҺȻˮָ֮֮ȣΪȻȡΪ0.21

7[.ѡ]״̬״̬ɵĽ޺ˮʳΪ()

A.Һ

B.

C.

D.Һָ

[]A

[]Һ״̬״̬ɵĽ޺ˮʳΪҺޡ

8[.ѡ]֪ijȻˮΪ25%Ϊ18%ҺΪ36%ҺָΪ()

A.Һָ=0.07

B.Һָ=0.18

C.Һָ=0.39

D.Һָ=0.61

[]C

[]Һָ=(w-wp)/(wl-wp)=(25-18)/(36-18)=0.39

9[.ѡ]ijȻˮΪ22%Ϊ11%ҺΪ34%ָΪ()%

A.ָ=11

B.ָ=12

C.ָ=23

D.ָ=48

[]C

[]ָ=Һ-=(34-11)=23%

10[.ѡ]ҺϲⶨУԲⶨӰǿ()Ǹ

A.Һ

B.

C.

D.

[]B

[]ϲⶨӰǿ޵Ǹ

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