心绞痛发生的原因和诱因不包括
A．甲状腺功能亢进症B．肥厚型心肌病C．冠状动脉畸形D．二尖瓣狭窄E．主动脉瓣狭窄
参考答案：D
—Danny, where would you like to go during your holiday?
—I want to visit _____ in China.[ ]
A.
B.
C.
D.
我国南方传统民居的屋顶坡度较大，主要是为了[ ]
A．便于接受更多阳光
B．便于空气流通
C．便于雨水下泻
D．便于更快散热
