天然气常用调峰方式包括（）

A、随着用气量的变化及时调节气源的供气能力或设置机动气源。With the change of air consumption, adjust the air supply capacity of air source or set the mobile air source.

B、利用一些大型工业企业作为城市用气的缓冲用户 。Use some large industrial enterprises as urban gas buffer users.

C、实行峰谷气价。Implement peak valley gas price. 鼓励双燃料发电行业夏季多用气（不同季节价格不同）Encourage the dual-fuel power generation industry to use more gas in summer (prices vary in different seasons).

D、设置各种储气设施。调峰方式主要包括地下储气库调峰、LNG调峰、液化石油气调峰、上游调峰、管道调峰、管束调峰和储气罐调峰等。Set up a variety of gas storage facilities. Peak regulation mainly includes peak regulation for underground gas storage, LNG peak regulation, LPG peak regulation, upstream peak regulation, pipeline peak regulation, tube bundle peak regulation and gas storage tank peak regulation.

城市天然气常用加臭剂为（），其加药标准为（）mg/m³。

B．固体和液体杂质必须消除干净

C．硫化氢和二氧公碳含量少

D．包括以上三种

A. 高温高压

B. 高温低压

C. 低温高压

D. 低温低压