耐力运动需要体内有充足的糖原储备,有利于增加糖原储备的营养素是()
A.糖类
B.蛋白质
C.脂肪
D.维生素
E.微量元素
参考答案:A, C, D
Mr. Smith is our teacher. He ______ English in our school for more than six years.[ ]
A. teaches
B. taught
C. will teach
D. has taught
肛瘘的主要临床症状是()
A.疼痛
B.瘙痒
C.分泌物
D.流脓