流行性出血热的传染源是（）
A.患者
B.宿主动物
C.蚊虫
D.苍蝇
E.黑猩猩
参考答案：B
The poet ______described the peaceful Rocky Mountain and the beautiful Mississippi River in his newly-published poetry.
A．aggressively
B．vividly
C．desperately
D．controversially
镜架几何中心水平距为28mm，单侧瞳距为29mm，则水平移心量为（）mm。
A、5
B、-5
C、4
D、-4
