[定位] 根据题干中的the principal constituent of natural gas定位到第一个小标题下的第三段第一句Natural gas consists primarily of methane(沼气)and other hydrocarbon gases.[精解] 本题提问天然气的主要成分。题干中的the principal constituent of与原文中的consists primarily of属于同义转换,所以consists prima...
a.carbon and hydrogen.b.methane and other what is the principal constituent of natural gas? a.carbon and hydrogen. b.methane and other hydrocarbon gases. c.saturated hydrocarbons. d.non-associated gas. 查看答案 更多"what is the principal constituent of natural gas?a.carbon and hydrogen.b....
Eye irritation assessment is compulsory to anticipate health risks in military personnel exposed to riot control agents such as capsaicin, the principal constituent of oleoresin capsicum, or pepper sprays. The present work investigates certain fundamental yet unaddressed pharmacological manifestations on ocular...
My uncle is___ principal of the No.1 middle school. A.a B.an C.the D./ 点击查看答案 第4题 What is the principal constituent of natural gas?A.Carbon and hydrogen.B.Methane and other What is the principal constituent of natural gas? A.Carbon...
题干中的the principal constituent of与原文中的consists primarily of属于同义转换,所以consists primarily of后面的methane and other hydrocarbon gases即是本题的答案所在,故本题答案为B 。 正确答案:B 解析:本题提问天然气的主要成分。题干中的the principal constituent of与原文中的consists primarily of属于同义...