已知tRNA一端的3个碱基是CUA,则此tRNA运载的氨基酸是 [ ]
A.亮氨酸
B.天冬氨酸
C.丙氨酸
D.缬氨酸
答案:B
下列说法符合地中海膳食结构特点的是()
A.食物加工程度高
B.主要食用油为动物油
C.膳食含大量复合碳水化合物
D.蔬菜水果摄入量低
E.多数成人有饮白酒习惯
A little knowledge is _______, because it can cause people to think they are more expert than they really are.
A.expensive
B.ordinary
C.precious
D.dangerous