分离流行性乙型脑炎病毒最好将死者脑组织匀浆接种于（）
A.幼鼠脑内
B.幼鼠腹腔
C.小鼠肌肉
D.小鼠皮下
E.小鼠尾静脉
参考答案：A
.It will at least take five months to repair the ship that was seriously __________by the hurricane.
A．destructed
B．ruined
C．damaged
D．broken
“一铲能铲千层岭,一担能挑两座山,一炮能翻万丈崖,一钻能通九道湾。两只巨手提江河,霎时挂在高山尖。”这首民谣创作的时代背景应是
A．延安大生产运动
B．农业合作化高潮
C．“大跃进”运动
D．土地改革
