下列哪对中药有补肝肾、强筋骨、安胎的功效（）
A.杜仲、续断
B.补骨脂、蛤蚧
C.香加皮、五加皮
D.党参、太子参
E.当归、白芍
参考答案：A
He spent thirty minutes in finishing his homework.
A．It took him half an hour to finish his homework.
B．It takes him half an hour to finish his homework.
C．It cost him half an hour to finish his homework.
D．He spend half an hour to on finishing his homework.
自2012年春节以来，我国多省市雾霾天气频发，PM2．5颗粒物是形成雾霾的罪魁祸首，PM2．5含量增多影响空气的能见度，它比粗颗粒降低能见度的能力更强，下列情况能直接造成雾霾天气的是（ ）
A．使用太阳能
B．随意丢弃塑料
C．随意丢弃废旧电池
D．就地焚烧秸秆、稻草
