Passage 1 It's one of our common beliefs that mice are afraid of cats. Scientists have long known that even if a mouse has never seen a cat before, it is still able to detect chemical signals released from it and run away in fear. This has always been thought to be something that is
into a mouse's brain. But now Wendy Ingram, a graduate student at the University of California, Berkeley, has challenged this common sense. She has found a way to "cure" mice of their inborn fear of cats by infecting them 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 of people around the world are infected by it. This parasite can cause different diseases among humans, especially pregnant women-it is linked to blindness and the death of unborn babies. However, the parasite's effects on mice are unique. 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 that normal mice stayed far away from the urine while mice that were infected with the parasite walked freely around the test area. But that's not all. The parasite was found to be more powerful than originally thought-even after researchers cured the mice of the infection. They no longer reacted with fear to a cat's smell, which could indicate that the infection has caused a permanent change in mice's brains. Why does a parasite change a mouse's brain instead of making it sick like it does to humans? The answer lies in evolution. "It's exciting scary to know how a parasite can manipulate a mouse's brain this way," Ingram said. But she also finds it inspiring. "Typically if you have a bacterial infection, you go to a doctor and take antibiotics and the infection is cleared and you expect all the symptoms to also go away." She said, but this study has proven that wrong. "This may have huge implications for infectious disease medicine."
Which of the following statements is true according to the passage?
【单选题】
( )是社会主义时期对教师提出的根本要求,也是进行教师道德评判的根本标准。
A.
教育民主
B.
教育人道主义
C.
教育发展
D.
忠于人民教育事业
参考答案
参考解析
【单选题】
Toxoplasma gondii causes people strange and deadly diseases.
With certain infection the infectious disease cannot be cured completely.
Human beings infected by toxoplasma gondii will have permanent brain damage.
Toxoplasma gondii is harmful to human beings, but it does no harm to mice.
【单选题】
患者,女,45岁,双乳肿块疼痛10余年,平素体弱,神疲倦怠,短气乏力,腰膝酸软,畏寒肢冷,月经失调。查双乳腺体增厚,于多个象限可触及片块结节,质韧,活动可,与皮肤无粘连,压痛,乳头有少量清水样溢液,舌淡苔白,脉沉细。其中医诊断及证型考虑为
乳癖 冲任失调证
乳疠 肝郁痰凝证
乳岩 正虚毒恋证
乳核 血瘀痰凝证
乳痨 肝肾不足证
【单选题】
关于甲亢手术治疗,下列选项正确的是
通常需切除双侧甲状腺腺体的60%~70%
处理甲状腺上极血管时应远离甲状腺上极
结扎甲状腺下动脉要尽量离开腺体背面靠近颈总动脉
甲状腺峡部要保留
止血充分时,术野可不放置引流
【A2型选择题】
患者表情呆滞,沉默寡言,记忆减退,失认失算,口齿含糊,词不达意,伴腰膝酸软,肌肉萎缩,食少纳呆,气短懒言,口涎外溢,腹痛喜按,鸡鸣泄泻,舌质淡白,舌体胖大,苔少,脉沉细弱,双尺尤甚。治疗应首选的方剂是( )
七福饮
归脾汤
洗心汤
还少丹
天王补心丹




