Keypointsforexamquestions Afractionisasetofhydrocarbonmoleculesofsimilarsizeandsimilarboilingpoints Plenary Nowattemptbookletquestions Q2(a)and2(b). Q3(i)and(iii) Q5(a)(i)AND Q6(a)(i) C1.4Crudeoil Lesson2-alkanes Objectives Must Recallthatmostofthecompoundsincrudeoilconsistofhydrocarbonscalledalkanes...
近年来，雾霾经常笼罩中国大片地区，雾霾天里，天气预报反复提醒人们要加强防范，尽量避免户外活动，即使户外活动也要采取必要的防护措施，但是，总有很多“勇敢”的人，他们完全不把这类提醒当回事，在雾霾严重的天气里从事各种户外活动，根本就不戴口罩。以下哪项最不可能是这些“勇敢者”雾霾天不带口罩的原因？
aWith the discovery of oil and gas in Ghana, the company has positioned itself to expand and improve its infrastructure with the construction of a 120,000 barrels a day stand alone Crude Distillation Unit. The expansion project will ensure reliability and security of petroleum products on the Gh...