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It is plain that in the year 2020 everyone will have at his elbow several times more mechanical energy than he has today．There will be advance in biological knowledge as far reaching as those that have been made in physics．We are only beginning to learn that we can control our biological environment as well as our physical one．Starvation has been predicted twice to a growing world population：by Malthus in about 1800．by Crookes in about 1900．It was headed off the first time by taking agriculture to America and the second time by using the new fertilizers．In the year 2020，starvation will be headed off by the control of the diseases and the heredity of plants and animals--by shaping our own biological environment．
Now I come back to the haunting theme of automation．The most common species in the factory today is the man who works or minds a simple machine--the operator．By the year 2020，the repetitive tasks of industry will be taken over by the machines，as the heavy tasks were taken over long ago；and the mental tedium will go the way of physical exhaustion．Today we still distinguish，even among repetitive jobs，between the skilled and the unskilled；but in the year 2020 all repetition will be unskilled．We simply waste our time if we oppose this change；it is as inevitable as the year 2020 itself．
If the predictions of the writer are realized，the demand for the unskilled workers in 21 st century will be__________．
推理判断题。根据文章第二段内容，现在反复作业仍分技术性的和非技术性的。但是到2020年，所有的反复作业将都变为非技术性的。这些反复作业都将被机器取代，因此非技术工人的数量将减少。
教师职业道德区别于其他职业道德的显著标志就是（ ）。
在教育史上主张“不愤不启，不悱不发”的教育家是（）。
心理学家所说的“危险期”或“心理断乳期”是指（ )。
教育工作中做到“因材施教”、“长善救失”符合年轻一代身心发展的（ ）。
德育过程与品德形成过程的关系是（ ）。
德育过程是培养学生（ ）的过程。
学生从事集体活动、结交好友的场所是（ ）。
教师的工作目的和使命是( )。
直接决定教育目的的因素是（ ）。
