某企业决定要在未来几年里，力争通过技术创新，使企业平均每年比上一年总产值增长10%、总成本降低20%．若该企业2010的总产值和总成本分别为300万元和100万元，则至少要到____（填年份）年底可使企业纯利润比2010年翻一番．

琼州胜景五公祠有副脍炙人口的对联：“只知有国，不知有身，任凭千般折磨，益坚其志;先其所忧，后其所乐，但愿群才奋起，莫负斯楼。”这副对联生动体现了中华民族精神中
①天下兴亡、匹夫有责的爱国情操 ②公正廉明、崇尚平等的民主精神
③淡泊名利、宁静致远的超然胸襟 ④自强不息、坚韧不拨的顽强斗志

《啊，船长，我的船长！》共三节，在思想感情方面不断上升、加深，请留意体会。“倒下来了，冷了、死了”这句诗多次间隔反复，起了什么作用？

在超导体研究领域．我国取得了令人瞩目的成就，关于超导状态下的超导体，下列说法中错误的是（  ）

在方框中填入一个恰当的词、或填入所给单词的适当形式，使短文通顺、正确、连贯。
    A lot of people wish to be slim, but at the same time they are____（worry）about their health. In fact, it is important for everyone to lose weight healthily. A strong body can keep you working in a high speed and make you more positive every day. However, how can you do it? Here's some good____（advice）.
    ●Drink plenty of water and eat____healthy diet. If you feel like____（eat）snacks, drink a glass of water first. If you are still hungry after 15____（minute）, then it's time for a light snack. Try to stay away from food with high calories, such as sweets and fast food.
    ●Do not eat____(much) than you can consume (消耗). People get fat because they can’t consume all the calories ____they get. So, knowing how many calories you really need is very important.
    ●Take enough exercise.  The  “333” is good   for you—exercise three____(time) a week, for at least 30 minutes at a time, and your pulse rate (脉搏率) should be more than 130 after____(exercise).
    Keep the three pieces of advice in mind and follow the advice. Then you'll____(sure) have a slim and strong body.