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A: 4. are the tomatoes, please?B: Five yuan a kilo.
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教案备课库《8(上)Unit 8 Section A》真题及答案
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题24图所示梁截面a处的弯矩是
Pl
Pl/2
2Pl
Pl/4
是以技术与管理为中心的总承包商
2PL
3PL
4PL
5PL
图示结构EI=常数弯矩M为
Pl/2(左侧受拉)
Pl/4(左侧受拉)
Pl/2(右侧受拉)
Pl/4(右侧受拉)
图示结构MBA值的大小为
Pl/2
Pl/3
Pl/4
Pl/5
图示简支梁在外力P作用下跨中A点右侧的内力是
MAC=PL,QAC=P
MAC=PL,QAC=P/4
MAC=-PL/4,QAC=P/4
MAC=PL/4,QAC=0
如图3-188所示梁截面a处的弯矩是【2012-24】
Pl
Pl/2
2Pl
Pl/4
图示体系不计阻尼的稳态最大动位移y=4Pl/9EI其最大动力弯矩为
7Pl/3
4Pl/3
Pl
Pl/3
在PP环中能完成恢复式倒换的支路板有
PL1
PD1
PL3
PL4
题36图所示索结构中a点弯矩为
Pl/8
Pl/4
Pl/12
专门为物流行业培养人才的物流企业属于
5PL
4PL
2PL
1PL
若图5-8-8所示梁B端的转角θB=0则力偶矩m等于
PL
PL/2
PL/4
PL/8
若图示梁B端的转角θ=0则力偶矩M等于
PL
PL/2
PL/4
PL/8
图示体系不计阻尼的稳态最大动位移ymax=4Pl3/9EI其最大动力弯矩为
7Pl/3
4Pl/3
Pl
Pl/3
图示结构EI=常数MCA=
PL/2(左侧受拉)
PL/4(左侧受拉)
PL/2(右侧受拉)
PL/4(右侧受拉)
若图示梁B端的转角θb=0则力偶矩M等于
PL
PL/2
PL/4
PL/8
题4图所示简支梁在外力P作用下跨中A点左侧的内力是
MAB=PL,QAB=P
MAB=PL,QAB=P/2
MAB=PL/4,QAB=P/4
MAB=PL/2,QAB=0
简支梁在跨中集中荷载作用下跨中弯矩是多少
1/4PL
1/2PL
1/4PL2
1/2PL2
图示结构EI=常数不考虑轴向变形MBA为以下侧受拉为正
Pl/4
-Pl/4
Pl/2
-Pl/2
图示结构B处弹性支座的弹簧刚度k=6EI/l3B截面的弯矩为
Pl
Pl/2
Pl/3
Pl/4
题3图所示简支梁结构其截面最大弯矩值为
Pl/3
Pl/6
4Pl/9
5Pl/9
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