题目

His close friend _____ for two years. A.died         B.has died            C.has been dead     D.has been died 答案：C15．关于人体对周围世界的感知，描述错误的是（　　）A．眼睛能看到远近不同的物体主要靠晶状体调节B．我们从外界获取的信息约有90%来自视觉C．近视眼看不清近处的物体，佩戴凹透镜纠正D．夏日中午刚走进电影院时瞳孔放大