举一反三
- 用力法计算图示超静定桁架，各杆EA为常数，可以选择右图作为基本体系。（）http...aa26763b97a18949.png
- 用力法计算图示超静定桁架，各杆EA为常数，可以选择右图作为基本体系。（）[img=422x232]17da6b2357a2498.png[/img]
- 用力法计算图示超静定桁架，各杆EA为常数，可以选择右图作为基本体系。（ ）[img=422x232]178698a6e1af3dd.png[/img] A: 错 B: 对
- 图示超静定梁，EI为常数，当两端发生图示角位移时引起梁中点C之竖直位移为<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/f16b12ac074447a4aefbcc274d69279f.png"/>（向下）。<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/56d5dcc1dbca4894b4d815fc5afef617.png"/>
- 设EI为常数，图示刚架支座C点的水平位移为（ ）。<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/2dea6754bc2a40df98d40ddc4d88e4ee.png"/> A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/876c3a939abd447fae12277cbbdf2885.png"/> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/9452dbf33f1b42bab8d279978b5294d8.png"/> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/c86de891367447249efb95cf363ee7cf.png"/> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/ba048b2d5eb149fbbe5a7b419903ef5b.png"/>
内容
- 0
图示桁架属于联合桁架。<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/e93c72f2406d471683613630813a7cfc.png"/>
- 1
下列体系中（）为有2个多余约束的几何不变体系。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/cce26c7360a2475da5177c25090b69ca.png"> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/73e7d8502ac34d5688684c88331fa605.png"> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/c88bc0988e5d4b509a4b0ccf0713a066.png"> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/95e90ca4bfaf448a981d70fce5bf8a3e.png">
- 2
图示刚架的弯矩图中正确的是（）。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/96bab3bc877f45e6bc366a1ed24b02e3.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/233d0c9147694598ab60919b0ee7a246.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/f8e911921bb447bdb2e8216ff1bca5cf.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/5c0b8a15b9174de3b636c8ea8a2eb281.png" />
- 3
图示刚架的弯矩图中正确的是（）。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/9e0e3376473a4da185371f58ac37647e.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/860e38197af74aec8db44a11df45c324.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/6ef75cc1379348698b95f277eda55fdd.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/bc248bb6f0cd424eae6b1e66aeb87da6.png" />
- 4
有两个化学反应，第一个反应的速率常数为<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/4327149b43ae49c3ac77b5d0c84cc7aa.png"/>，活化能为<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/349adc341333412a870ba08a9cf01203.png"/>，第二个反应的速率常数为<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/041f4e49d23d4ac895caa62faff5e5c7.png"/>，活化能为<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/cf2e46d6949c48c999a4dae421f0093a.png"/>，k1 大于k2，则这两个化学反应活化能大小关系正确的是（ ）。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/6c92556e93a94eb2b3e20966b5eee871.png"/> B: 不能确定 C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/c59bf3d35c3b41a6ae12ba9da0f6acb4.png"/> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/e2395739b30f47dd9fd37f780ccee24a.png"/>