在如图所示结构中，拉杆的剪切面形状是（ ），面积是（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/56a1054f3ed343948ac50668c3fc1d9b.png
举一反三
- 图（a）所示结构的FQD右影响线如图（b）所示。（ ）http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/633c85057ef8421db83f2a4a90d1fcc4.jpg
- 在绘制程序流程图时，下面哪个表示“选择结构”【 】 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/f690d214ae1a4af7b5efcdb4b898f2ac.png"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/d5525f58c3264ce69be6c8a899f5e49c.png"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/f058e79b5ce846e1a57975ef8d0a9ac8.png"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/6aa136bdf7f8499fa1bccb119e6db668.png">
- 下列碳正离子的稳定性最大的是（ ） A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/5ae2658f66544b629fdcabed52d5f957.png"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/1cefba39460048ef898157ea2ebc28b4.png"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/451893995c5e4c8f8109398975819582.png"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/31d934d857664b5c8e554a3b9c0fde75.png">
- 在绘制程序流程图时，表示“输入输出框”的符号是【 】 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/f8903e583d58447c95256614aeba2b23.png"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/085165f724e2411fa13d32a63e72667f.png"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/2496fc2bccf1452a919f2ab41a7abe3b.png"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/e54f827918da4e828650b0540ff0c15f.png">
- 下列哪味中药为桂枝 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/1ecec46f5cb24d1fba6eda07816fff21.JPG"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/6630610aa0cf4408832ccd382a3263e2.JPG"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/862f3e2a8fb7477cba0e4142b90606da.JPG"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/fb77e5e5386c43739e4ef959765e0dcd.jpg">