A.20%
B.23.75%
C.25%
D.30%
[单选题]A.235㎡B.255㎡C.275㎡D.295㎡
[单选题]A.2.87B.3.13C.3.42D.3.96
[单选题]A.2.87B.3.13C.3.42D.3.96
[单选题]A.800mmB.1000mmC.1200mmD.1500mm
[单选题]A.20%B.23.75%C.25%D.30%
[单选题]A.800mmB.1000mmC.1200mmD.1500mm
[单选题]A.a点为高电位,电流由a至bB.a点为高电位,电流b由至aC.b点为高电位,电流由a至bD.b点为高电位,电流b由至a
[单选题]A.a点为高电位,电流由a至bB.a点为高电位,电流b由至aC.b点为高电位,电流由a至bD.b点为高电位,电流b由至a
[单选题]A.a点为高电位,电流由a至bB.a点为高电位,电流b由至aC.b点为高电位,电流由a至bD.b点为高电位,电流b由至a
[单选题]A.a点为高电位,电流由a至bB.a点为高电位,电流b由至aC.b点为高电位,电流由a至bD.b点为高电位,电流b由至a