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【判断题】
Wanda Lott has the utility function U(x;y)=max{x,y}.Wanda's preferences are convex.A.
正确
B.
错误
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举一反三
【单选题】“一五”计划期间，我国采用了高度集中的计划经济体制。对高度集中的计划经济体制，我们的正确认识是（） ①它便于集中全国有限的人力、物力、财力保证了我国重点建设项目的完成 ②它严重阻碍了社会生产力的发展，从而使我国经济长期停滞不前 ③在生产力低下的情况下，它保证了人民群众最基本的生活需要 ④它的基本特点是，权力集中在中央，所有经济活动都在计划范围内进行
A.
①③④
B.
②③④
C.
①②③
D.
①②④
【单选题】At some schools online courses were firstconducted for_______
A.
all the students who choose the courses
B.
students who live on campus
C.
students who have no time in taking regularclasses
D.
students who live far away from school
【单选题】前进道路上,我们必须始终把人民对美好生活的向往作为我们的奋斗目标,践行党的根本宗旨,贯彻党的群众路线,尊重人民主体地位,尊重人民群众在实践活动中所表达的意愿、所创造的经验、所拥有的权利、所发挥的作用,充分激发蕴藏在人民群众中的创造伟力。对上述材料的实质概括最准确的是
A.
坚持党的执政地位,是历史和中国人民的正确选择
B.
坚持党的执政地位,是历史和中国人民的正确选择
C.
党坚持以人民为中心,不断实现人民对美好生活的向往
D.
坚持党对一切工作的领导,发挥员的先锋模范作用
【单选题】Students with psychological training who were tested
A.
marked less than 2 percent of their possible choices correction
B.
were less able to judge correctly than the average students
C.
did better than the average students in the group
D.
did as well as the women students
【单选题】When college students were asked about their experiences in childhood, those who remembered their parents frequently being in pain were also those who experienced common pains, like headaches, most fr...
A.
Students who most frequently remembered that they were in pain as children were no more likely than the average student to experience common pains very frequently.
B.
Parents who were frequently in pain when their children were growing up often experience just as much pain after their children have grown up.
C.
College students are in general less susceptible to common pains, like headaches, than are older s.
D.
memories of the circumstances of childhood pain are often vivid, but s can rarely recall the subjective experience of being in pain as a child.
E.
A person's recollections of childhood are likely to emphasize those memories that reflect the person's experiences.
【简答题】常用的电光源按其发光原理可分为两大类，即热辐射光源和气体放电光源，其下列属于热辐射光源的有（ ）。
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