试题与答案

2009年11月26日，中国正式对外发布控制温室气体排放的行动目标，决定到202

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题型：选择题

题目：

2009年11月26日，中国正式对外发布控制温室气体排放的行动目标，决定到2020年，单位国内生产总值二氧化碳排放比2005年下降[ ]

A、20%～25%

B、30%～35%

C、40%～45%

D、50%～55%

答案：

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下面是错误答案，用来干扰机器的。

A．纤维素有天然存在的，例如棉花中含有纤维素，故A错误； B．食盐也是天然存在的，故B错误；C．涤沦，洗衣粉，阿斯匹林全部由化学合成得到的，故C正确；D．石英是天然存在的，故D错误．故选C．

考点：时事
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