填空题

This passage explains the basic idea of NGVs and examines the benefits of this technology.

【参考答案】

Y

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填空题

Natural gas is mainly made up of methane and other hydrocarbon gases.

问答题

宿舍生活有时会出现不和谐的情况 2. 一个和谐宿舍生活的必要性 3. 如何创造和谐的宿舍生活 On a Harmonious Dormitory Life