试题与答案

教育行动研究是以教师的教育实践为主要导向的。

题型:判断题

题目:

教育行动研究是以教师的教育实践为主要导向的。

答案:

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下面是错误答案,用来干扰机器的。

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题型:选择题

读下四个国家示意图,回答1-3题。

1.关于四国地理特征的叙述,不正确的是(   )

A 、甲国被誉为“骑在羊背上的国家”

B 、乙国是世界上输出农产品最多的国家

C 、丙国北部海域有世界著名的渔场

D 丁国位于欧洲的“十字路口”

2.关于四国位置的叙述,正确的是(    )

A 、四国都位于东半球            B 、四国都位于北半球

C 、四国都临海                 D 、四国都位于温带

3.关于四国河流的叙述,正确的是(    )

A、甲国最长河流为内流河

B、乙国有世界最长的河流

C 、丙国河流径流量最稳定

D、丁国河流航运价值大

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题型:单项选择题

All animals must rest, but do they really sleep as we know it The answer to this question seems obvious. If an animal regularly stops its activities and stays quiet and unmoving—if it looks as though it is sleeping—then why not simply assume that it is in fact sleeping But how can observers be sure that an animal is sleeping

They can watch the animal and notice whether its eyes are open or closed, whether it is active or lying quietly, and whether it responds to light or sound. These factors are important clues, but they often are not enough. Horses and cows, for example, rarely close their eyes, and fish and snakes cannot close them. Yet this does not necessarily mean that they do not sleep. Have you ever seen a cat dozing with an eye partly open Even humans have occasionally been observed to sleep with one or both eyes partially open. Animals do not necessarily lie down to sleep either. Elephants, for example, often sleep standing up, with their tusks resting in the fork of a tree. Finally, while "sleeping" animals often seem unaware of changes in the sounds and light and other stimuli around them, that does not really prove they are sleeping either.

Observations of animal behavior alone cannot fully answer the question of whether or not animals sleep. The answers come from doing experiments in "sleep laboratories" using a machine called the electroencephalograph (EEC). The machine is connected to animals and measures their brain signals, breathing, heartbeat, and muscle activity. The measurements are different when the animals appear to be sleeping than when they appear to be awake. Using the EEC, scientists have confirmed that all birds and mammals studied in laboratories do sleep. There is some evidence that reptiles, such as snakes and turtles, do not truly sleep, although they do have periods of rest each day, in which they are quiet and unmoving. They also have discovered that some animals, like chimpanzees, cats, and moles (who live underground), are good sleepers while others, like sheep, goats, and donkeys, are poor sleepers. Interestingly, the good sleepers are nearly all hunters with resting places that are safe from their enemies. Nearly all the poor sleepers are animals hunted by other animals: they must always be watching for enemies, even when they are resting.

According to the author, all animals()

A. spend some time resting

B. close their eyes when sleeping

C. are good sleepers

D. are poor sleepers

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