【单选题】呈圆柱形,质硬而韧,不易折断,断面纤维性强,并显粉性,皮部黄白色,木部淡黄白色,有放射状纹理及裂隙的药材是
【单选题】根呈长圆柱形或长圆锥形;质硬而韧,不易折断,断面显纤维性()
【单选题】根呈圆柱形,表面灰黄色或淡褐色,质硬而韧,不易折断,断面纤维性并显粉性,味微甜的药材是
【单选题】Martin stated that he had set______apart from other hip-hop artists by trying to elevate rap music to new heights.
【单选题】有机物 CH 3 O — C 6 H 4 — CHO ,有多种同分异构体,其中属于酯且含有苯环结构的共有 种
【单选题】根呈圆柱形,表面灰黄色或淡褐色,质硬而韧,不易折断,断面纤维性并显粉性,味微甜的药材是