单选题:what's the main idea of this passage ?

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题目内容:

what's the main idea of this passage ? A.Experts are concerned about excessive drinking in teenagers.
B.The harm of e-cigarettes is greater than that of alcohol.
C.Teenagers are in danger of risking their health on e-cigarettes.
D.Researchers are aware of smoke-related health hazards.

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The commercial use of CCS in the power sector was realized i

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社会下层人士具有模仿社会上层人士的倾向,这是G•塔尔德所说的(  )。

社会下层人士具有模仿社会上层人士的倾向,这是G•塔尔德所说的(  )。 A.上升律 B.先内后外律 C.下降律 D.先外后内律

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Several billionaires have donated a large sum of money to ma

Several billionaires have donated a large sum of money to malting the world bet

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以下关于活页式账簿的表述正确的有(  )。

以下关于活页式账簿的表述正确的有(  )。A.它是在账簿登记完毕之前并不固定装订在一起,而是装在活页账夹中 B.账簿的页数不固定,使用前不装订,可以根据实际需要

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下列资产负债表中,根据总账科目余额直接填列的是( )。

下列资产负债表中,根据总账科目余额直接填列的是( )。A.无形资产 B.短期借款 C.投资性房地产 D.固定资产

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