高中英语 Unit 22 Environmental Protection-Lesson3自我小测 北师大版选修8.doc

unit 22 environmental protection-lesson3.单词拼写1his temper is c_，so do not annoy him.2i_is important in growing crops.3the battleship shall be a_with another five guns.4there is abundant r_in our hometown.5a new railway is being c_.选择适当的短语，并用其正确形式填空1they were pleased to meet after_.2only_can you improve your english.3he realized that sleepiness _this accident.4about 10 million bengalis _india.5he_in guangzhou by selling newspapers.根据课文阅读下面的句子。每句有一处错误，找出并改正1in the last decade，thunderstorms，floods，earthquakes，typhoons，volcanic eruptions，tsunamis and forest fires have become decreasingly common._2this catastrophe is still very fresh in the minds of people worldwide who have yet got over their separation from loved ones lost in the tsunami._3atlantic hurricanestheir howling winds with speeds of over 300 kilometres an hourare 40% weaker now than they were 30 years ago._4volcanoes and earthquakes are even less dangerous than in the past as around half the worlds population now lives in cities._5because these natural disasters occur at random times，it is easy to warn people in advance._.简答题the north magnetic pole(磁极)is no longer a resident of canada.it has drifted across the canadian arctic and is now angling toward siberia.not to be confused with the geographic north polethe northern extremity of the earths axis(地轴)，the north magnetic pole(where the earths magnetic field is directed downward)is moving due to natural changes in the earths magnetic field，a process that originates about 3000 kilometers below our feet，in the outer core(核心)of the planet.but scientists are now noticing that the magnetic pole has picked up its pace.over the past century，the pole has been migrating at an average speed of about 10 kilometers per year，says larry newitt，head of geomagnetic laboratory at natural resources canada in ottawa.since the 1970s，this speed has increased to about 50 kilometers per year.scientists are wondering why the speed is increasing，says newitt.one hypothesis(假说)relates it to “magnetic jerks”，sudden shifts(变化)in the rate of change of the magnetic field.there have been three jerks in the past four decades，each one correlating to an increases in speed.if the north magnetic pole continues at its current rate，it could reach siberia by 2056.“for most of recorded history，the pole has been a part of canada，and now its not，”says newitt.“it may be a blow to our collective psyche，but other than that，it doesnt have a major effect on most peoples existence.”1find in the passage a word closest in meaning to the underlined word “angling”_2what could happen to the north magnetic pole by the middle of the 21st century？(回答词数不超过8个)_3what is the main idea of the passage？(回答词数不超过8个)_参考答案.1答案：changeable2答案：irrigation3答案：armed4答案：rainfall5答案：constructed.1答案：such a long separation2答案：by this means3答案：had resulted in4答案：fled to5答案：earned his living.1答案：decreasinglyincreasingly2答案