首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
职称考试
根据以下材料,回答 It′s one of our common beliefs that miceare afraid of cats. Scient...
根据以下材料,回答 It′s one of our common beliefs that miceare afraid of cats. Scient...
admin
2020-12-24
7
问题
根据以下材料,回答
It′s one of our common beliefs that miceare afraid of cats. Scientists have long known that even if a mouse has neverseen a cat before, it is still able to detect chemical signals released from itand run away in fear. This has always been thought to be something that is hard-wiredinto a mouse′ s brain.
But now Wendy Ingram, a graduate student atthe University of California, Berkeley, has challenged this common sense. Shehas found a way to "cure" mice of their inborn fear of cats by infectingthem with a parasite, reported the science journal Nature.
The parasite, called Toxoplasma gondii,might sound unfamiliar to you, but the shocking fact is that up to one-third ofpeople around the world are infected by it. This parasite can cause different diseasesamong humans, especially pregnant women--it is linked to blindness and thedeath of unborn babies.
However, the parasite′s effects on mice areunique, Ingram and her team measured how mice reacted to a cat′ s urine (尿) before and after it was infected by the parasite. They noted thatnormal mice stayed far away from the urine while mice that were infected withthe parasite walked freely around the test area.
But that′s not all. The parasite was foundto be more powerful than originally thought--even after researchers cured themice of the infection. They no longer reacted with fear to a cat′s smell, whichcould indicate that the infection has caused a permanent change in mice′ sbrains.
Why does a parasite change a mouse′s braininstead of making it sick like it does to humans? The answer lies in evolution.
"It′s exciting scary to know how aparasite can manipulate a mouse′s brain this way," Ingram said. But shealso finds it inspiring. "Typically if you have a bacterial infection, you go to a doctor andtake antibiotics and the infection is cleared and you expect all the symptomsto also go away." She said, but this study has proven that wrong. "This may have huge implicationsfor infectious disease medicine."
The author′s attitude towards theexperiment is ____________.
选项
A.positive
B.subjective
C.negative
D.objective
答案
D
解析
态度题。在整篇文章中,作者都是在客观地叙述WendyIngram的新发现。故选D。
转载请注明原文地址:https://ti.zuoweng.com/ti/BaH8KKKQ
相关试题推荐
根据下面背景材料,回答第19~20题。 2015年3月,我国在西昌卫星发射中心成功发射北斗卫星导航系统第17颗卫星。在发射之前,科学家就发射时间、设备安...
根据材料,按要求完成教学设计任务。 材料:高中思想政治必修1经济生活《科学的宏观调控》的教材内容: 社会主义市场经济的正常运行与发展,既需要充分发...
材料:下面是南京市某中学思想政治课教师关于“文化创新的途径”的课堂教学设计(教学时间为45分钟)。 问题:请运用思想政治课程教学理论。简要评价...
材料一:一种好的教学方法对教学的顺利开展并且获得优异的成效,具有重要意义。 材料二:2015级思想政治教育班的同学在实习时,王老师向他们讲授教学技巧,...
由某县委政法委联合相关部门共同制定的《村规民约》作为“基本模板”,在全县156个中心村逐步推行,各村根据本村特点,经村民大会补充调整增减内容,形成适合本村...
根据材料。按要求完成教学设计任务。 材料:高中思想政治必修4《生活与哲学》中的节选: 实践及其特点 实践是人们改造客观世界的物质性活动。凡是实践,都...
材料:以下是贵州省某中学教师在《树立正确的消费观》课堂中设计的新课教学环节。 【新课教学】 1.生产和消费的辩证关系: 活动一:看小品《昨天今天明天...
阅读材料,回答问题。 一位新教师面向校内上公开课,教学内容是《经济生活》中的“依法纳税”。在分析“依法纳税是公民义务”时,列举了很多生活中存在的违反税法...
让人民享有健康丰富的精神文化生活是全面建设小康社会的重要内容。 材料一:某省文化资源丰富,文化底蕴深厚,但文化发展与经济社会发展还不平衡,还不能很好地...
材料:中医药文化是中国文化宝库中的瑰宝。从龙脑樟树中提取的龙脑具有极高药用价值和保健功能。《寿域神方》记载:“之头脑疼痛,龙脑一钱,纸卷做拈,烧烟熏鼻,吐...
随机试题
下列属于特种药物的是 A、胎盘球蛋白 B、抗毒血清 C、蛇毒疫苗
处于青春期的小明由于学习成绩不好,常常发脾气,甚至摔东西或者与父母吵架。社会工作
苦味有下列作用()。
根据反思的时间,教学反思可以分为()。
对于相关总部资产能够按照合理和一致的基础分摊至该资产组的部分,应当将该部分总部资
按照保险业务的承保方式来分类,可将保险划分为( )。
成本费用按照成本与产量的关系可以分为()。A.生产成本和制造成本B.经营成本和总成本C.单位产品成本和总成本费用D.固定成本和可变成本
政府间事权划分的效率原则包括()。A:收入划分效率B:投入产出效率C:支出划分效率D:财政转移支付效率E:政府绩效评价效应
并购贷款是指银行为境内企事业法人在改制、改组过程中,有偿兼并、收购国内其他企事业法人、已建成项目,以及进行资产、债务重组发放的贷款。( )
下列关于甲企业会计人员在讨论会计职业道德和会计法律制度两者关系的表述中,观点正确的有______。A.违反会计法律制度一定违反会计职业道德B.违反