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Passage 1
Plants and animals that have been studied carefully seem to have built-in clocks. These biological clocks, as they are called, usually are not quite exact in measuring time. However, they work pretty well because they are "reset" each day, when the sun comes up.
Do pigeons use their biological clocks to help them find directions from the sun? We can keep pigeons in a room lit only by lamps. And we can program the lighting to produce artificial "days",different from the day outside. After a while we have shifted their clocks. Now we take them far away from home and let them go on a sunny day. Most of thegn start out as if they know just which way to go, but choose a wrong direction. They have picked a direction that would be correct for the position of the sun and the time of day according to their shifted clocks.
It is known and experimented that homing pigeons can tell directions by the sun. But what happens when the sky is darkly overcast by clouds and no one can see where the sun is? Then the pigeons still find their way home. The salne experiment has been repeated many times on sunny days and the result was always the same. But on very overcast days clock-shifted pigeons are just as good as normal pigeons in starting out in the right directions. So it seems that pigeons also have some extra sense of direction to use when they cannot see the sun.
Naturally, people have wondered whether pigeons might have a built-in compass—something that would tell them about the directions of the earth's magnetic field. One way to test that idea would be to see if a pigeon's sense of direction can be fooled by a magnet attached to its back.
With a strong magnet close by, a compass can no longer tell direction.
To test the idea, a group of ten pigeons had strong little magnet bars attached to their backs.
Another group carried brass bars instead which were not magnetic. In a number of experiments,both groups were taken away f
根据第一段中的“However，they work pretty well because thev are‘reset’each dav，when the sun comes up．”与第二段的实验可推知B项正确。
《义务教育数学课程标准（2011年版）》强调，课程内容要反映社会的需要、数学的特点，要符合学生的认知规律。课程内容的组织要重视过程，处理好（）的关系。
设α是某一方程组的解向量，k为某一常数，则kα也为该方程组的解向量。（ ）
案例：
在有理数运算的课堂教学片段中，某学生的板演如下：
针对该学生的解答，教师进行了如下教学：
师：请仔细检查你的演算过程，看是否正确无误？
生：好像正确吧。
请分析例题1、例题2中每一步运算的依据。（10分）
初中数学课程是一门国家课程，其主要内容包括课程目标、教学内容、教学过程和( )等
教师职业道德区别于其他职业道德的显著标志就是（ ）。
对高中数学的评价，下列说法错误的是( )。
