流行性乙型脑炎病毒感染中,最常见的是()。
A.病原体被清除(一过性感染)
B.隐性感染
C.显性感染
D.病原携带状态
E.潜伏性感染
参考答案:B
—What happened to Bill?
—He ________ really fast when suddenly he ran into a parked car.
A.had run
B.was running
C.has run
D.has been running
表示地中海气候的是( )
A.甲
B.乙
C.丙
D.丁