咽后壁组织瓣的宽度设计一般为咽后壁宽度的()
A.2/3
B.1/3
C.1/2
D.1/4
E.3/4
参考答案:A
— How long _____ the movie since it began?
— Only ten minutes.[ ]
A.has, lasted
B.had, lasted
C.has, been lasted
D.had, begun
非洲动植物资源丰富,是_________、_________、枣椰作物的原产地。