工字形截面如图所示，为（ ）。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/03bcd53fdd9947e68039e2494aff9735.png
举一反三
- 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">
- 下列哪味中药为柴胡 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/52f519e3210144ab87fef57fa951264a.jpg"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/67ed1a0a3783414782a019ae69ea0581.jpg"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/661692aff17840c4a892da13f70a78e8.jpg"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/3f64d19bea8741acb95f5a5b1a9dc3ae.jpg">
- 下列哪味中药为薄荷 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/ae69de68d087475e823f581068ff4f77.jpg"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/2d39f4d4bb8847e1b6a60941b31c77ae.jpg"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/42e273e3124546be90b3c33b518c82c5.jpg"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/1973b7c80e2943188e3d38338d0d309d.jpg">
- 下列哪味中药为桑叶 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/c0e0ae23be6d47b6b27f5e1b4d8888ac.jpg"> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/97a0e9f9cb314206a0d958c82cdc84df.jpg"> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/ebb0a4cd94a14170a78bfcad353e09c1.jpg"> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/053bbb87a23c4bc18406f94418b083f6.jpg">
- 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