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只有7%的成年人「比六年級學生聰明」。你是個合格的天才嗎？
官方有八顆行星，因為冥王星在2006年被天文學家重新分類為矮行星。皮膚完全覆蓋身體，保護內部的一切，在普通成人身上重約8-10磅。火星從地球上看是紅色的，因為它的表面覆蓋著氧化鐵，與使鐵鏽變紅的化學物質相同。平均一個靜止的心臟每分鐘跳動約60-100次，24小時內加起來約100,000次。從離太陽最近的順序是水星 → 金星 → 地球 → 火星，然後是巨行星。動脈是強韌、有彈性的管子，將血液從心臟帶走。雖然大多數動脈攜帶鮮紅色的含氧血液，但肺動脈是一個重要的例外，它將缺氧血液帶到肺部。截至2025年，土星以超過145顆已確認的衛星領先，其中大多數由冰和岩石組成。心臟有四個腔室：兩個接收血液的上心房和兩個泵出血液的下心室。白血球是免疫系統的士兵，攻擊細菌、病毒和其他入侵者。天王星的軸心傾斜達98°，所以它基本上是側著繞著太陽滾動。木星是太陽系中最大的行星。它比地球寬約11倍，赤道直徑為88,846英里（約142,984公里）。心房（單數：atrium）在將血液輸送到心室之前，從靜脈收集傳入的血液。金星的厚厚二氧化碳大氣層像失控的溫室一樣吸收熱量，使其溫度達到近470°C。血液總是紅色的。富含氧氣時呈鮮紅色，缺氧時則變成深紅色。地球大約需要365.25天，這就是為什麼我們每閏年會多加一天。氮氣約佔地球大氣層的78%；氧氣只佔約21%。植物通過葉子上的微小孔洞吸收二氧化碳，並將其與水結合以製造糖和氧氣。葉綠素使植物呈現綠色，並讓它們將光能轉化為化學能。在苔原，除了夏天解凍的薄薄頂層外，地面全年保持凍結。細胞核就像控制中心，包含細胞所需的一切指令。陽光透過光合作用驅動天氣、洋流和幾乎所有的生命。細胞呼吸發生在粒線體中，將糖和氧氣轉化為能量、二氧化碳和水。基因是DNA的片段，就像建造和運行身體的說明手冊。ATP（腺苷三磷酸）就像是可充電電池，為細胞幾乎所有活動提供動力。肝臟製造膽汁並儲存在膽囊中，直到脂肪食物到來。氣孔張開和關閉，讓二氧化碳進入，氧氣／水蒸氣排出。碳原子可以連接成鏈狀和環狀，構成生命所需的複雜分子。大紅斑是木星大氣層中一個持續存在的高壓區域，產生一個反氣旋風暴，是太陽系中最大的。這就是為什麼麵包或餅乾在你咀嚼很長時間後會開始嘗起來有點甜。葉綠體是進行光合作用的綠色工廠。生態系統包括動物、植物、天氣、土壤和水，它們共同作用。蒸騰作用有助於像吸管一樣將水分和養分從根部向上輸送。血漿是血液中黃色的液體部分，它像送貨卡車一樣運送所有其他物質。海王星是距離最遠的官方行星，所以它的一年大約等於165個地球年。您的身體使用這些胺基酸組成塊來修復肌肉和製造新細胞。地球表面約71%被海洋、湖泊和河流覆蓋。O是單字母符號；O₂僅表示空氣中兩個氧原子鍵合在一起。顱骨由22塊融合的骨骼組成，形成一個堅硬的頭盔保護大腦。太陽是離地球最近的恆星，距離地球約8光分。植物利用陽光製造自己的食物，所以其他一切都依賴於它們。You scored 0 out of 40You scored 1 out of 40You scored 2 out of 40You scored 3 out of 40You scored 4 out of 40You scored 5 out of 40You scored 6 out of 40You scored 7 out of 40You scored 8 out of 40You scored 9 out of 40You scored 10 out of 40You scored 11 out of 40You scored 12 out of 40You scored 13 out of 40You scored 14 out of 40You scored 15 out of 40You scored 16 out of 40You scored 17 out of 40You scored 18 out of 40You scored 19 out of 40You scored 20 out of 40You scored 21 out of 40You scored 22 out of 40You scored 23 out of 40You scored 24 out of 40You scored 25 out of 40You scored 26 out of 40You scored 27 out of 40You scored 28 out of 40You scored 29 out of 40You scored 30 out of 40You scored 31 out of 40You scored 32 out of 40You scored 33 out of 40You scored 34 out of 40You scored 35 out of 40You scored 36 out of 40You scored 37 out of 40You scored 38 out of 40You scored 39 out of 40You scored 40 out of 40
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