问题
单项选择题
在精神分裂症的病因学研究中，目前认为最重要的因素是
A．遗传因素
B．环境因素
C．生化因素
D．脑萎缩
E．精神因素
答案
参考答案：A
解析：大量的家系调查，孪生子、寄养子调查结果显示，血缘关系越近，精神分裂症患病概率越高。精神分裂症可能是多基因遗传，由若干基因的叠加作用所致。
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在精神分裂症的病因学研究中，目前认为最重要的因素是
A．遗传因素
B．环境因素
C．生化因素
D．脑萎缩
E．精神因素
参考答案：A
解析：大量的家系调查，孪生子、寄养子调查结果显示，血缘关系越近，精神分裂症患病概率越高。精神分裂症可能是多基因遗传，由若干基因的叠加作用所致。
任务型阅读（每空一词） It's 7 a.m. It's time to go to school. What? You don't want to go? Well, maybe you don't have to. Many children don't go to school.They stay at home. Someone teaches them at home. Usually,their parents teach them, but sometimes a special teacher teaches them. This is home schooling. There are many reasons for home schooling. Some children are very sick and cnnnot go to school. Some students live very far in the country. There aren't any schools near their homes. Sometimes, parents just don't like the schools near their homes. Home schooling sounds easy, but it's really not. Home-school students have to do the same work as regular(正规的)students. They study the same subjects and have homework. Also, home-school students don't meet other students in school. Sometimes, finding friends can be hard for them. Not going to school can be harder than you think. Home _____小题1:______
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