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【单选题】
温室效应有功有过，产生温室效应的主要气体是CO 2 ，下列有关认识错误的是（ ）A.
CO 2 能使干燥石蕊纸花变红
B.
CO 2 能使澄清石灰水变浑浊
C.
“低碳”是指较低的CO 2 排放
D.
温室效应为人类提供了适宜的生存温度
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【单选题】关于毛果芸香碱对眼调节作用的叙述，正确的是
A.
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B.
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C.
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D.
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E.
睫状肌松弛、悬韧带拉紧、晶状体变扁平
【简答题】title documen__________(翻译)
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