美国杜克大学的研究人员发明了一种方法，只用手指的一滴血就能在流鼻涕和发热等症状出现之前检测出谁将患上流感．如图表示某同学在医院取指血时兴奋在反射弧中的传导和传递过程的模式图，请回答有关问题：

小明从冰箱拿出一个鸡蛋，他发现不一会鸡蛋上布满了许多细小水珠，过一段时间见小水珠又都自动消失了，关于以上现象解释正确的是（　　）

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CaliforniaCondor's Shocking Recovery

      California condors are North America's largest birds, with wing-length of up to 3 meters. In the 1980s, electrical lines and lead poisoning(铅中毒) nearly drove them to dying out. Now, electric shock training and medical treatment are helping to rescue these big birds.

      In the late 1980s, the last few condors were taken from the wild, and there are now more than 150 flying over California and nearby Arizona, Utah and Baja in Mexico.

      Electrical lines have been killing them off. “As they go in to rest for the night, they just don’t see the power lines,” says Bruce Rideout of San Diego Zoo. Their wings can bridge the gap between lines, resulting in electrocution(电死) if they touch two lines at once.

So scientists have come up with a shocking idea. Tall poles, placed in large training areas, teach the birds to stay clear of electrical lines by giving them a painful but undeadly electric shock. Before the training was introduced, 66% of set-freed condors died of electrocution. This has now dropped to 18%.

Lead poisonous has proved more difficult to deal with. When condors eat dead bodies of other animals containing lead, they absorb large quantities of lead. This affects their nervous systems and ability to produce baby birds, and can lead to kidney(肾) failures and death. So condors with high levels of lead are sent to Los Angeles Zoo, where they are treated with calcium EDTA, a chemical that removes lead from the blood over several days. This work is starting to pay off. The annual death rate for adult condors has dropped from 38% in 2000 to 5.4% in 2011.

        Rideout's team thinks that the California condors’ average survival time in the wild is now just under eight years. “Although these measures are not effective forever, they are vital for now,” he says. “They are truly good birds that are worth every effort we put into recovering them.”

                                                                                                       祖母的葵花
    我总是要想到葵花，一排一排，种在小院门口。
    是祖母种的。祖母伺弄土地，就像她在鞋面上绣花一样，一针下去，绿的是叶，再一针下去，黄的是花。
    记忆里的黄花总也开不败。丝瓜、黄瓜是搭在架子上长的，扁扁的绿叶在风中婆娑，那些小黄花，就开在叶间，很妖娆地笑着。南瓜多数是趴在地上长的．长长的蔓，会牵引得很远很远。像对遥远的他方怀了无限向往，蓄着劲儿要追寻了去，在一路的追寻中，绽放大朵大朵黄花。黄得很浓艳，是化不开的晴。
    还有一种植物，被祖母称作“乌子”的。它像爬山虎似的，顺着墙角往上爬，枝枝蔓蔓都是绿绿的，一直把整座房子包裹住了才作罢。忽一日，哗啦啦花都开了，远远看去，房子插了满头黄花呀，美得让人心醉。
    最突出的，还是葵花。它们挺立着，情绪饱满，斗志昂扬，迎着太阳的方向，把头颅昂起，再昂起。小时候我曾奇怪于它怎么总迎着太阳转呢，伸了小手，拼命拉扯那大盘的花，不让它看太阳，但我手一松，它弹跳一下，头颅又昂上去了，永不可折弯的样子。
    凡高在1888年的《向日葵》里，用大把金黄来渲染葵花。画中，一朵一朵葵花，在阳光下怒放，仿佛是“背景上迸发出的燃烧的火焰”。凡高说，那是爱的最强光。在颇多失意颇多彷徨的日子里，那大朵的葵花，给他幽暗沉郁的心，注入最后的温暖。
    我的祖母不知道凡高，不懂得爱的最强光，但她喜欢种葵花。在那些缺衣少吃的岁月里，院门前那一排排葵花，在我们心头，投下最明艳的色彩。葵花开了，就快有香香的瓜子嗑了。这是一种香香的等待，这样的等待很幸福。
    葵花结籽，亦有另一种风韵。沉甸甸的，望得见日月风光在里头喧闹。这个时候，它的头颅开始低垂，有些含羞，有些深沉，但腰杆仍是挺直的。一颗一颗的瓜子，一日一日成形，饱满，吸足阳光和花香。葵花成熟起来，蜂窝一般的。祖母摘下它们，轻轻敲，一颗一颗的瓜子，就落到祖母预先放好的匾子里。放在阳光下晒，会闻见花朵的香气。一颗瓜子，原来是一朵花的魂啊！
    瓜子晒干，祖母会用文火炒熟，这个孩子口袋里装一把，那个孩子口袋里装一把。我们的童年就这样香香地过来了。
    如今，祖母老了，老得连葵花也种不动了。老家屋前，一片空落的寂静。七月的天空下，祖母坐在老屋院门口，坐在老槐树底下，不错眼地盯着一个方向看。我想，那里，一定有一棵葵正在开放，开在祖母的心窝里。