供应桥脑的血管为（）
A.颈内动脉
B.大脑中动脉
C.大脑前动脉
D.前交通动脉
E.基底动脉
参考答案：E
相对压强的起算基准是：（）
A.绝对真空
B.1个标准大气压
C.当地大气压
D.液面压强
While large numbers of residents in this area ___the A/H1N1 flu, very few suffered death.
A．picked up
B．took up
C．brought up
D．caught up
