from practice and in_turn serve practice. 所有的理论都来源于实践，并反过来为实践服务。 ④Now it_is_your_turn_to look after the children. 现在轮到你照看孩子了。 3prevent...from　阻止；制止 (教材P26)They are putting too much carbon dioxide into the atmosphere，which prevents heat from escaping from the earth into space.　他们把过多的二氧化碳释放到大气层中，这使得地球上的热不能释放到太空中去。 归纳拓展 ①Once he has made up his mind，no one can prevent

　　him from carrying out the plan. 一旦他下定决心，谁也阻止不了他执行这个计划。 ②(朗文P1612)Guards stood at the doors to prevent anyone from leaving.守卫站在门口阻止任何人离开。 ③Measures have been taken to protect_the_rivers_from_being_polluted.已采取措施保护河水不受污染。 4cheer up　感到高兴；感到振奋 (教材P31)I cheered up immediately and floated weightlessly around in our spaceship cabin watching the earth become smaller and the moon larger.　我立刻感到很高兴，由于失重我在太空舱里飘来飘去，我望着(身后的)地球越来越小，而(前方的)月球越来越大。 Unit 4　Astronomy：the science of the stars ——天文学：恒星科学 基础盘点自测自评 核心单词

　　1. They are both teachers.Otherwise they are ____________(不同) . 2. There are many different ____________(方法) to solve this problem. unlike methods 3．We have learnt that oceans cover two thirds of the

【2016高考英语一轮课件优化复习（山东专用）人教版必修三《Unit4 Astronomy：the science of the stars 》天文学：恒星科学】相关文章：

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