流感病毒吸附细胞的结构是()。
参考答案:血凝素
促进区域协调发展的目标在于( )。
A.做大一个地区经济总量
B.缩小地区间经济总量差距
C.缩小地区间公共服务和生活水平差距
D.体现以人为本理念,
— Do you know him?
— No.I've never remembered having ____a man like that. [ ]
A. come across
B. come out
C. come about
D. come up