Adsorption of CO oxidation intermediates on Ag<img class="glyph" src="https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/16/entities/sbnd" />Au nanoparticles across quantum-confined to bulk-like size regimes

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The last decade hasn’t been smooth. Brewster rattles off challenges: tariffs on equipment and consumables sourced from China, Europe, Mexico, and Canada; price hikes on vinyl and paper; labor shortages; and SBA lending issues layered on top of the whiplash of COVID, when only “necessary businesses” were allowed to stay open.

与摄影器材、舞台灯光类似,它属于活动经济的一部分,而活动经济本身具有明显的淡旺季波动。只要旺季结束,设备闲置率就会上升。

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