下列对平面几何中有关三角形性质的表述，不正确的是( )。

【名词&注释】

独立思考(independent thinking)、句子成分(sentence element)、国家中长期教育改革和发展规划纲要、教育主管部门(educational administrative departments)、特别规定(special provisions)、相应措施(corresponding measures)、履行职责(acquittal)、国家规定、实际情况(actual situation)、概念学习(concept learning)

[单选题]下列对平面几何中有关三角形性质的表述，不正确的是( )。

A. 等边三角形的三个角相等
B. 三角形两边之和大于第三边
C. 三角形内角和为1 80度
D. 直角三角形的两个锐角都是45度

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学习资料：

[单选题]《国家中长期教育改革和发展规划纲要（2010-2020年）》提出了构建灵活开放的教师教育体系的改革目标，关于这一目标，下列表述中正确的一项是( )。

A. 师范院校为主体，校本培训为辅
B. 师范院校为主体，综合大学参与
C. 校本培训为主体，师范院校为辅
D. 综合大学为主体，师范院校参与

[单选题]下列哪种情况下造成的学生伤害事故，学校应当承担责任( )。

A. 在学生自行上学、放学、返校、离校途中发生的
B. 学生或其监护人知道学生有特异体质，或者患有特定疾病，但未告知学校的
C. 学生行为具有危险性，学校、教师已经告诫、纠正，但学生不听劝阻，拒不改正的
D. 学校组织学生参加教育教学活动或校外活动，未对学生进行相应的安全教育，并未在可预见的范围在采取必要的安全措施的

[单选题]评价教师教学和学生学习质量的标准和依据是( )。

A. 课程计划
B. 课程标准
C. 考试用书
D. 教科书

[单选题]根据奥苏伯尔对有意义学习的分类，如果儿童听到"鸟"或看到文字的"鸟"，就知道它代表实际的鸟.即使此时并未见到真实的鸟，儿童也能以语言或文字的形式在大脑中形成关于鸟的形象。这属于( )。

A. 概念学习^{(concept learning)}
B. 命题学习
C. 发现学习
D. 抽象符号学习

[单选题] On average, American kids ages 3 to 12 spent 29 hours a week in school, eight hours more than they did in 1981. They also did more household work and participated in more of such organized activities as soccer and ballet. Involvement in sports, in particular, rose almost 50% from 1981 to 1997: boys now spend an average of four hours a week playing sports; girls log half that time. All in all, however, children's leisure time dropped from 40% of the day in 1981 to 25%. "Children are affected by the same time crunch (危机) that affects their parents," says Sandra Hofferth, who headed the recent study of children's timetable. A chief reason, she says, is that more mothers are working outside the home.(Nevertheless, children in both double-income and "male breadwinner" households spent comparable mounts of time interacting with their parents,19 hours and 22 hours respectively. In contrast, children spent only 9 hours with their single mothers.) All work and no play could make for some very messed-up kids."Play is the most powerful way a child explores the world and learns about himself," says T. Berry Brazelton, professor at Harvard Medical School. Unstructured play encourages independent thinking and allows the young to negotiate their relationships with their peers, but kids ages 3 to 12 spent only 12 hours a week engaged in it. The children sampled spent a quarter of their rapidly decreasing "free time" watching television. But that, believe it or not, was one of the findings parents might regard as good news. If they're spending less time in front of the TV set, however, kids aren't replacing it with reading. Despite efforts to get kids more interested in books, the children spent just over an hour a week reading. Let's face it, who's got the time?

Nowadays, the troublesome problem is that American kids

A. are increasingly neglected by their working mothers
B. are involved less and less in household work
C. are spending more and more time watching TV
D. are engaged in lots of structured activities

[单选题]教育具有自身发展的规律，在有些方面不一定会随着社会的改变而改变。这反映了教育的哪一些特征?

A. 阶级性
B. 生产性
C. 目的性
D. 相对独立性

[单选题]The man________the dark glasses fled away from the spot very rapidly.

A. in
B. at
C. of
D. by

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