【Daily Question】Production, Storage, and Transportation - 20190624
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The AC version of Production, Storage and Transportation offers a question per day; answering it correctly earns 5 wealth points； Effective participation grants 2 units of wealth ； Extra points will be given to those who provide a reasonable explanation first. Multiple-choice question: When H2 is mixed with air, the ignition range for H2 is 4.0%–74.2%. In which of the following situations is ignition impossible? （ ） A. The H2 content is 50.0% B. The H2 content is 20.0% C. The H2 content is 10.0% D. The H2 content is 2.0% D. The H2 content is 2.0%
D, H2 content: 2.0%
D, H2 content: 2.0%
D, H2 content: 2.0%