以啮齿类动物为主要传染源的是
A.流行性脑脊髓膜炎B.流行性乙型脑炎C.流行性感冒D.狂犬病E.流行性出血热
参考答案:E
They wanted the house at the foot of the mountain ______in a way to look pretty
A.build
B.to build
C.built
D.building
程序性知识学习由哪几个阶段构成?