正确答案: D

直角三角形的两个锐角都是45度

题目：下列对平面几何中有关三角形性质的表述，不正确的是( )。

解析：有一个角为90°的三角形，叫做直角三角形。其它两个角的角度没有特别规定。等腰直角三角形两个锐角都是45度。故选择D。

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学习资料的答案和解析：

[单选题]以下关于绝对评价说法不正确的是( )。

可以用Z分数来表示

解析：Z分数的计算需要计算团体的平均成绩和标准差，通过Z分数可以看出某分数在分布中的相对位置，这属于相对评价。而绝对评价是根据学生的测验分数去直接判断其是否达到了教学目标，若达到则合格，否则不合格，不涉及团体中的相对位置。

[单选题]Passage 1 　　In recent years, however, society has cometo understand the limitations of schoolsthat merely sort and rank students. We have discovered that students in the bottomone-third to one-half of the rank order-plus all who drop out before being ranked--fail to develop the foundational reading,writing, andmathematical proficiencies needed to survivein, let alone contribute to, an increasinglytechnically complex and ethnically diverse culture. So today, in asking schools toleave no child behind, society is askingthat educators raise up the bottom of therank-order distribution to a specified level of competence. We call those expectations our academic achievement standards Every statehas them, and, as a matter of public policy,schools are to be held accountable for lakingsure that all students meet them. 　　To be clear, the mission of sorting has not been eliminated from the schooling process.For the foreseeable future, students will still be ranked at the end of high school. However,society now dictates that such a celebrationof differences in amount learned must start at a certain minimum level of achievement for all. 　　The implications of this change in missionfor the role of assessment are profound. 　　Assessment and grading procedures designedto permit only a few students to succeed(those at the top of the rank-order distribution)must now be revised to permit the possibilitythat all students could succeed at some appropriate level. Furthermore, proceduresthat permitted(perhaps even encouraged)some students to give up in hopelessness andto stop trying must now be replaced by othersthat promote hope and continuous effort.In short, the entire emotional environmentsurrounding the prospect of being evaluatedmust change, especially for perennial low achievers. 　　The students' mission is no longer merelyto beat other students in the achievementrace. At least part of their goal must be to become competent. Teachers must believethat all students can acnieve a certain levelof academic success, must bring all of theirstudents to believe this of themselves, must accommodate the fact that students learn at different rates by making use of differentiatedinstruction, and must guide all studentstoward the attainment of standards. 　　The driving dynamic force for students cannot merely be competition for an artificialscarcity of success. Because all students can and must succeed in meeting standards,cooperation and collaboration must come intoplay.The driving forces must be confidence,optimism, and persistence--for all, not justfor some. All students must come to believethat they can succeed at learning if theytry. They must have continuous access to evidence of what they believe to be credible academic success, however small. Thisnew understanding has spawned increasedinterest in formative assessment in recentyears.

Which is meant by the author about the emotional promise of assessment for students?

To build up their confidence insuccess

解析：根据题干中的关键词emotional promise将答案：锁定在第三段和最后一段。根据第三段“Assessment and grading procedures... mustnow be revised to permit the possibility that allstudents could succeed at some appropriatelevel.. must now be replaced by others thatpromote hope and continuous effort ...”lak最后一段“The driving dynamic force for students cannot merely be competition for an artificialscarcity of success..The driving forces must be confidence, optimism, and persistence...”可推断出作者表达的意思是通过评估改革，教师要激发学生的自信与希望，使他们相信通过不断的努力，终会取得成功。故选择B。

[单选题]多年来，曾老师坚持让学生采用反思记录表、学习日志或成长记录袋等多种方法来记录学习过程，并不断指导学生优化记录的方法。曾老师的做法( )。

尊重了学生的自主性

解析：学生是具有独立意义的主体，"以人为本"的学生观要求把学生置于教育活动的主体地位，充分地调动学生的主观能动性，引导学生积极主动地参与到教育活动过程中。题干中，曾老师坚持让学生采用多种方法记录自己的学习过程，是尊重学生的自主性的表现。