鱼鳍yú qí ：鳍(qí)
参考答案：
是鱼和其他水生脊椎动物适应水中生活的运动器官。鱼鳍是由皮肤、柔软的鳍条和坚硬不分节的鳍棘构成。
________ for the fact that she broke her leg, she might have passed the exam.
A．Hadn't it been
B．Had it not been
C．Was it not
D．Were it not
能清胃肠湿热，常用治热痢的药（）
A.胡黄连
B.白头翁
C.黄连
D.黄柏
E.穿心莲
