www.ks5u.com听说训练(4)Part A模仿朗读听录音,模仿朗读短文,注意画线单词的发音。短文读两遍。The moons monthly cycle and its influence on the tides causes many events in the ocean,but there is an even longer rhythm that has the greatest effect of allthe annual cycle of the sun.The sun position relative to the earth changes through the year and it is this that produces the seasons.In the north,spring comes as the sun begins to rise higher in the sky.Off the northwest coast of North America,the seas are transformed by the increasing strength of the sunshine.Here in Alaska the coastal waters turn green with a sudden bloom of sea plants.The moons monthly cycle and its