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| Eight times within the past million
years, something in the Earth’s climatic equation has changed, allowing snow in
the mountains and the northern latitudes to accumulate from one season to the
next instead of melting away. Each time, the enormous ice sheets resulting from
this continual buildup lasted tens of thousands of years until the end of each
particular glacial cycle brought a warmer climate. Scientists speculated that
these glacial cycles were ultimately driven by astronomical factor: slow, cyclic
changes in the eccentricity of the Earth’s orbit and in the tilt and orientation
of its spin axis. But up until around 30 years ag A. Many a phenomenon might be caused by astronomical factors. B. Any hypothesis should be abandoned unless supported by solid records. C. Glaciers are the records keeping Earth’s astronomical cycles. D. Oxygen isotopes are evenly distributed throughout the earth surface. [单选题]手工电弧焊施焊时，电弧的（ ）曲线在U型曲线的水平段
A.静特性 B.外特性 C.内特性 D.动特性 [单选题]调査显示少儿图书在2007年的销售量同比增长近25%,成为续经管、学术文化类图书后的又一髙增长模块。在2007年全国图书零售市场中,少儿图书所占的比重达到11%以上;本土原创儿童文学作品销量更是呈井喷之势，在各大书店的少儿图书畅销排行榜上，往往占据一半以上的席位。根据这段文字可知，2007年（）。
A.少儿图书销量超过学术文化图书 B.图书市场整体结构发生较大变化 C.少儿图书销量占零售市场的两成以上 D.畅销儿童文学作品有本土原创化的倾向 [单项选择]（）是指为出售而持有的，或在将来收获为农产品的生物资产的实际成本。
A. 生产性生物资产 B. 农业生产成本 C. 生物性在建工程 D. 消耗性生物资产 [判断题]第 756 题, 本小题 1 分
在保护盘上或附近进行打眼等振动较大的工作时,应采取防止运行中设备跳闸的措施,必要时经值班调度员或值班负责人同意,将保护暂时停用。 A.正确 B.错误 [多选题]《关于修改〈预防行包货盗管理办法（试行）〉的通知》(运营物流电[2015]2674号)规定,对（ ），相关站（段）按规定进行调查、问询。
A.尖端保密物品 B.麻醉品 C.放射性物品 D.声明价格在1万元以上物品 [多选题]高处作业应（）。
A.搭设脚手架 B.使用高空作业车 C.使用升降平台 D.采取其他防止坠落的措施 [单选题]螺栓折断，严重锈蚀、丝扣损坏或杆径磨耗超过( )不能保持规定的扭矩，应及时更换。
A.1mm B.2mm C.3mm D.4mm [多选题]客运调度是指负责管辖线路内（ ）、（ ）、（ ）、（ ）等工作的专职人员。
A.运营信息的收集与发布 B.客流情况监控 C.客服热线 D.运营日报编制 [单项选择]大出血后出现气短，心悸，冷汗淋漓，四肢厥冷，脉微欲绝，诊断为（）
A. 气血两虚 B. 气虚失血 C. 气随血脱 D. 气虚下陷 E. 阴虚阳亢 [多选题]关于放款核准岗，下列说法正确的是
A.放款核准岗要认真对接收的信贷档案进行审查、把住关口 B.放款核准岗要认真对接收的审批资料进行审查、把住关口 C.不得以贷款已由授审中心审查审批而弱化对贷款审查 D.发现风险环节必须及时中止放款 [多选题]特殊旅客包括()
A.重要旅客 B.无成人陪伴儿童 C.病残旅客 D.孕妇 E.盲人 [不定项选择题]共用题干
Teaching Math,Teaching Anxiety
In a new study about the way kids learn math in elementary school,the psychologists at the University of Chicago Sian Beilock and Susan Levine found a surprising relationship between what female teachers think and what female students learn:If a female teacher is uncomfortable with her own math skills,then her female students are more likely to believe that boys are better than girls at math. If these girls keep getting math-anxious female teachers in later grades,it may create a snowball effect on their math achievement said Levine. In other words,girls may end up learning math anxiety from their teachers. The study suggests that if these girls grow up believing that boys are better at math than girls are,then these girls may not do as well as they would have if they were more confident. Just as students find certain subjects to be difficult,teachers can find certain subjects to be difficult to learn一and teach. The subject of math can be particularly difficult for everyone. Researchers use the word“anxiety”to describe such feelings:anxiety is uneasiness or worry. The new study found that when a teacher has anxiety about math,that feeling can influence how her female students feel about math. The study involved 65 girls,52 boys and 17 first-and second-grade teachers in elementary schools in the Midwest. The students took math achievement tests at the beginning and end of the school year,and the researchers compared the scores. The researchers also gave the students tests to tell whether the students believed that a math superstar had to be a boy. Then the researchers turned to the teachers:To find out which teachers were anxious about math,the researchers asked the teachers how they felt at times when they came across math,such as when reading a sales receipt. A teacher who got nervous looking at the numbers on a sales receipt,for example,was probably anxious about math. Boys,on average,were unaffected by a teacher's anxiety. On average,girls with math-anxious teachers scored lower on the end-of-the-year math tests than other girls in the study did. Plus,on the test showing whether someone thought a math superstar had to be a boy,20 girls showed feeling that boys would be better at math一and all of these girls had been taught by female teachers who had math anxiety. “This is an interesting study,but the results need to be interpreted as preliminary and in need of replication with a larger sample,”said David Geary,a psychologist at the University of Missouri in Columbia. David Geary thinks that______. A.the study is interesting but it is based on unreliable research process B.the research results need to be retested based on a larger sample C.the research results need to be reinterpreted to be meaningful D.the study is well based and produces significant results [判断题]CRH1A型动车组自动过分相接收装置的一级修检查标准是：外观及安装状态良好，连接电缆不得断裂破损,转接插头连接紧固状况良好。
A.正确 B.错误 [判断题]无缓和曲线时，超高顺坡可在圆曲线和直线上进行。( )
A.正确 B.错误 [单项选择]汉字输入编码方案中的自然码属于( )类编码。
A. 数字 B. 字音 C. 字形 D. 混合 我来回答: 提交
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