下列物质中，（）能提高催化剂活性。_聚丙烯装置操作工(初级)_全学科试题题库

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下列物质中，（）能提高催化剂活性。
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Passage " Arms and the clarion for the battle, but the song of thanksgiving to the victory! " answered the liberated David. " Friend, " he added, thrusting forth his lean, delicate hand forwards Hawkeye, in kindness, while his eyes twinkled and grew moist, "I thank thee the hairs of my head still grow where they were first rooted by Providence for, though those of other men may be more glossy and curling, I have ever found mine own well suited to the brain they shelter. That I did not join myself to the battle, was less owing to disinclination, than to the bonds of the heathen. Valiant and skilful hast thou proved thyself in the conflict, and I hereby thank thee, before proceeding to discharge other and more important duties, because thou hast proved thyself well worthy of a Christian s praise. Questions:This novel was written by the first American novelist. What is his name?

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