【环境保护】

    纽芬兰渔场曾是世界四大渔场之一，有“踩着鳕鱼群的脊背就可上岸”的传说。自20世纪五六十年代开始，大型机械化拖网渔船成群结队地驶入了纽芬兰湾。这些渔轮夜以继日地捕捞，庞大的捕鱼网兜掠过海底，除了鱼群在劫难逃，连海底生态也被破坏殆尽。面对鳕鱼资源的枯竭，加拿大政府被迫于1992年宣布彻底关闭纽芬兰及圣劳伦斯湾沿海渔场。如今关闭已二十多年了，鱼群仍不见踪影。

    就在纽芬兰出现危机的时候，隔着大西洋相对的国家——挪威的鳕鱼也开始告急。鳕鱼捕捞是挪威北部的经济命脉，幸运的是，经过3年的痛苦等待，挪威的渔民们终于欣喜地看到了大鳕鱼群的回归。

    依据材料及所学知识推测挪威政府为了保护鳕鱼资源采取的措施。

    It is the world's most well-known and popular song. It has been sung hundreds of millions of times each year. It has been heard in outer space, at baseball stadiums, in movies and in domiciles(住处)from the White House to the most remote(遥远的) backwoods shack(窝棚) in Misissippi. It has been wired into millions of music boxes, greeting cards, watches, toys, games and other tune-playing products. And it is the only song in the English language to make people of all ages smile and sing along. The song, of course, is Happy Birthday to You".

    This amazing song began its life in 1893. Written by two sisters from Kentucky, Mildred and Patty Hill, it was originally (起初) named “Good Morning to All”, and intended as a classroom greeting from teachers to students:

    Good morning to you

    Good morning to you

    Good morning, dear children

    Good morning to all.

    To this day, no one knows for sure who wrote the new words to Hill's melody(旋律),or exactly when it happened. “Happy Birthday to You” first appeared in a songbook in1924.The words were presented as the second stanza(节) to "Good morning to You".

人口增长模式的转变主要受生产力水平的影响。（  ）

收藏家收藏的一清末铝制品至今保存仍十分完好，该铝制品不易锈蚀的主要原因是（    ）