“植物人”是指只有呼吸和心跳等基本生命活动的病人，这种病人脑中唯一没有损伤的部位是 [ ]
A．大脑
B．小脑
C．中脑
D．脑干
答案：D
_______ many times , he still couldn’t understand it．
A．Told
B．Having been told
C．Having told
D．He had been told
雾中行车应使用（）、示宽灯，勤按喇叭以示警告。
