圆轴受力如右图，其危险截面在（ ）段。https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/e8d41f37c42c4cbbb6c8d46f00c05821.png
举一反三
- 如右图所示拉杆头的挤压面积为( )。<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/7ddd21a3a4e849f68c4d176b971c7c55.png" /> A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/df97de243a424ac58b1dc7cb70374683.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/eab41cb13f55410ea57bc67fbf155a7b.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/8c54a383f7e8426eb0f0f7c435a433ba.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/9120d45143384f29aef7b86ea444f7f3.png" />
- 外径为D、内径为d的空心圆轴，其扭转截面系数为（ ）。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/af42d1bd70034c0d85f2f419a2839f22.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/2e74a84c10d14288a269b7b8def735f1.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/55aca62def3e4c9485e9b0894a63a342.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/6ed4e2143b6a4c82ad03319473bb6a3a.png" />
- 如图所示电路的逻辑表达式F=（ ）。<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/8655693a417e4e43a32e0732ed533c96.png" /> A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/beda73211aea49f082d9137fd4eb0526.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/7388c99ee0824f20bcf85893934a2f6a.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/9a5c81e78b344c79a9389e932a7f55ce.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/82193a9a030243728012b02e15718987.png" />
- 单筋矩形截面受弯构件正截面承载力计算的基本公式适用条件不包括 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/5b801d200a534980a307a3cb99810fba.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/ec299665c7d544b9b5d3b03075a613cb.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/a5961b74c3c3423fa3ba1aaa49e779e1.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/b119dbfce14a487ea5e13e6625026f25.png" />
- Photoshop中要在图片中输入文字，用到的工具按钮是（ ） A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/c0c50098dece4e42b091271a5f9e3a12.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/5720e52f331147b2908ad71505b0a75d.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/23261f8b02b04a18afc9d58501bc97ba.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/8630dd134cdd4b4d9f3aba5deb1a0ec7.png" />