题目

根据短文内容, 从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 Ebola is a dangerous virus that can cause people to get very sick and even die. The virus is causing the biggest problems in western Africa, where it has spread quickly. But it can get worse and cause life-threatening symptoms(症状), such as bleeding and trouble breathing. Ebola does not spread like colds or the flu because it does not float through the air. Ebola also doesn't spread through food or water, like some other viruses. Instead, Ebola spreads when someone 下图为外界物体在视网膜上的成像过程示意图。请分析作答: (1)眼睛被喻为“心灵的窗户”,图中[   ]          就是窗户上那层明亮的玻璃。 (2)远处物体反射来的光线,经过[   ]         的折射在[   ]          上形成物像。 (3)青少年如果用眼不当极易造成近视,可配戴             透镜加以矫正。 (4)李慧同学阅读莫言作品时,随故事情节潸然泪下。在此过程中,文字先在眼内成像并产生神经冲动,然后通过[   ]          传递到                  产生视觉。这种反射属于          (“简单”/“复杂”)反射。 (5)通过调节瞳孔大小我们能看清楚明、暗处的物体。那么瞳孔相当于显微镜的(   ) A.目镜             B.物镜              C.光圈              D.反光镜
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