简述波浪传播过程中能量损失的途径。
参考答案：
①摩阻损失。海底床面对波浪水流的摩阻力引起能量损失；
②渗透损失。当海底泥沙颗粒较粗，渗透性较大时，由于波峰和波谷的波浪压力不同，在床质内部引起渗透水流而造成的能量损失。
③泥面波阻力损失。当海床由流动性的淤泥质软泥组成时，波峰和波谷下的压力差可能诱发泥面波，由于软泥内部粘性很大，因此泥面波也可能导致损失一部分或大部分能量。
用方框中所给词的适当形式填空
As a Chinese American student,I have to say about the value differences _66____the two countries. American kids love to make money by_67___. Chinese kids almost always ask money from their parents.So American kids spend _68____than they have but Chinese kids spend less money,and they have more money left in the bank. For American parents __69____to an expensive but famous college is useless(没用的).Chinese parents would do anything _70___their children to good colleges even if it means that they have to sell everything they own. American girls always take part in sports,dancing and singing __71__while Chinese girls always go to art or music groups. And American students think that B is a gift _72____ Chinese students think that B is a death sentence( 判决 ). American parents __73___their daughters or sons to go out with their boyfriends or girlfriends as long as they come home at their certain time.Chinese students aren’t allowed(允许) to do so in the middle or high schools. American parents support and encourage their children all the time while Chinese parents_74____that criticism( 批评 )is the best love in the world.So American parents only look at their ___75____good side.Chinese parents seem to only see their children’s bad side. I don’t want to say which culture is better because both culture have their pros and cons( 优点和缺点 ) 66 ______ 67 ______ 68 ______ 69 _____ 70 _____ 71_______ 72 ______ 73 ______ 74______ 75______ |