[Saturday Practice **Questions 2016.11.12] You get 3 wealth rewards just for participating, and 9 wealth rewards if you answer all questions correctly]

2016-11-12View Original

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This post was last edited by percy on 2016-11-13 08:34. 1. The fractions obtained directly from the distillation of crude oil generally retain the original properties of petroleum; for example, they basically do not contain (　　). A. Saturated hydrocarbons B. Asphaltenes C. Aromatic hydrocarbons D. Unsaturated hydrocarbons 2. During the secondary combustion in a heating furnace, it will cause ( ). A. Positive pressure in the furnace chamber B. Negative pressure in the furnace chamber C. Increased furnace efficiency D. Decreased flue gas temperature. Answers: 1D, 2A. Reminder: Once the hidden answers are shown, no scoring will be given for replies. Thank you!

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[Saturday Practice **Questions 2016.11.12] You get 3 wealth rewards just for participating, and 9 wealth rewards if you answer all questions correctly]

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