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在下面括號內列舉的科學家中,對發現和完善萬有引力定律有貢獻的是              
                          。(安培、牛頓、焦耳、第谷、卡文迪許、麥克斯韋、開普勒、法拉第)
第谷、開普勒、牛頓、卡文迪許解析:
第谷搜集記錄天文觀測資料、開普勒發現開普勒三定律、牛頓發現萬有引力定律、卡文迪許測定萬有引力常數
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據報道,中學生的身體素質有所下降。這一情況已經引起全社會的關注和教育部門的高度重視。下圖是某中學關于青少年體育鍛煉的宣傳標語。
請你根據下面的要點和要求,用英語寫一篇短文,80詞左右。
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2.鍛煉身體的方式:ballgames,running,
swimming,...
3.請你談談對學校開展體育鍛煉的看法或建議。(至少寫兩點)
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科目:初中英語 來源: 題型:

[物理選修3-5模塊][
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科目:初中英語 來源: 題型:閱讀理解

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The story mainly tells us that        .
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