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He was charged with _______ ( break) into several computer systems over the last year.
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实验室用含杂质的锌(也称粗锌)与盐酸反应制取氢气,取8.0g含杂质的锌粒于烧杯中(所含杂质不溶于水,也不与酸反应),向其中加入73.0g稀盐酸,恰好完全反应后烧杯内剩余物质的质量为80.8g。计算:
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Mrs. Smith has a bottle of medicine named 666 POWDER FOR COLD at home. Here is the instuction of it.
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