石灰石中的CaCO3分解产生CO2，提高了煤气中CO2的浓度，有利于改_爱下问搜题

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问题判断题

石灰石中的CaCO₃分解产生CO₂，提高了煤气中CO₂的浓度，有利于改善煤气利用。（）

答案

参考答案：错

完形填空

完形填空。

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good time on Saturday and Sunday.

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单项选择题

一般而言，责任保险承保的民事责任主要是（）。

A、侵权责任

B、违约责任

C、无过失责任

D、过失责任