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大横杆可用于设置在立杆内侧,其长度不能小于( )。 A.5跨B.4跨C.3跨D.2跨



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ˮƽڲ,䳤ȲС( ) A.1B.2C.3D.4ȷ𰸼ؽ ȷ D ޽ ...
...ڲ,䳤ȲС3,ں͵( )...
ֹּܽܵĴڲ,䳤ȲС3,ں͵( ) A.3mB.4mC.5mD.6mȷ𰸼ؽ ȷ D ˿...
...ڲ,䳤ȲС3,ں͵( )...
ֹּܽܵĴڲ,䳤ȲС3,ں͵( ) A.3mB.4mC.5mD.6mȷ𰸼ؽ ȷ D ˿...
ɽʡͨѶCలȫԱ
Ӧ 4 ,ҲӦ 6m 10ˮƽڲ,䳤Ȳ...A.1 B.2 C.3 D.4 11ˮƽ()Ľͷ...
2017ϰ㽭ʡ̰ȫԱ
A.5 B.10 C.15 D.20 20...2.0m 5ˮƽڲ,䳤Ȳ...A.1 B.2 C.3 D.4 6ǿʽ...
ȫڰϰ(4)
ȫڰϰ(4) (ڰ ʩȫ) һѡ 1.ڲ,䳤ȲС__ A. 2 B. 3 C. 4 D. 5 2....
2014갲ȫ
ڲ,䳤ȲС( ),ں͵( )m A.2;5 B.3;6 C.4;7 D.5;8 2.ɵгѹֵӦС( )KN,֧а...
2016㽭ʡȫԱC֤˿Ծ
A豸 5 ̨ B.ʱ豸...1ˮƽڲ,䳤ȲС__...A.1 B.2 C.3 D.4 2ͼ...
ӱʡBలȫԱ֤鿼
A.22 B.18 C.24 D.26 20ˮƽڲ,䳤ȲС__ A.1 B.2 C.3 D.4 21ȫҪڻⲻҪ...
2016㽭ʡCలȫԱ
A.0.35MPa B.0.40MPa C.0.45MPa D.0.50MPa 3ˮƽڲ,䳤ȲС__ A.1 B.2 C.3 D.4 4ǽ...
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