用位移法计算图示刚架结构，下列内力计算选项正确的是（ ）A:
B:
C:
D:
举一反三
- <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/c41f262ea5014597ae40b4dfc9074dcd.png" />用位移法计算图示刚架由支座移动引起的内力。各杆<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/1f20f3ffaad94769b3e7340c77916a42.png" />。下列选项错误的是（ ） A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/f66530ad4965479096c911a53a950211.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/92126acdd09f4686a1090e5acf3b3644.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/5e3db21f3771422e8925a94bb39f5458.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/a5e7e30e19f143fe94631a9acf072c5a.png" />
- <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/b4672b87107445c0978de191fa119efd.png"/>用位移法计算图示对称结构。各杆EI=常数。下列选项错误的是（ ） A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/30d417fb469c4bed94079d25513062de.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/160eda74dac74a2fb3a403918da72123.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/fa4d77df2cbb41508f8f0874d3a0a16a.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/bf5b181844ba40c394a4a636138d90bd.png" />
- 下列关系正确的有（ ） A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/0c9a6360c85f4ff9bdb2b17b576df2e0.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/09c3ca64214040d89eaa8534fa21d895.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/3d88f37ec20c4604a8387c0e1088ad34.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/d48f61b369aa425384b1d565afb5d073.png" />
- 阿糖胞苷的化学结构为（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/588c9b478695464b9617893b2e1c303a.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/86b60f7b512f43a29c8431f882722d1b.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/4546ccb30ea64350a626b0cd337e2c98.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/8f610edce6dd4a2e81ca814690e0b5ec.png" />
- 下列最稳定的自由基是（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/7ff51d95af804e74bbffb2091d336668.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/a7bc08ef90914e13a5f795670eb1e67b.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/6f85cd60c27645c39d58990b87615ebf.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202012/f5d0c506ba09424a838f7aee98e94e43.png" />