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Many people have been helped with canned food. However, the food bank needs ________ for the poor.


  1. A.
    more
  2. B.
    many
  3. C.
    much
  4. D.
    most
A
解析:
解決此題的關(guān)鍵是弄清句子意思。前一個(gè)分句說明,很多人得到了救濟(jì)的罐裝食品,句中可認(rèn)為省略了表示比較的than ever(before)短語(yǔ)。因此此處相當(dāng)于the food bank needs more(canned)food than ever(before).
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However, most living beings that exist under warm conditions die when frozen. This is because of the harmful effects of freezing ice crystals(晶體), which not only are larger than the volume(體積) of the water originally in the cells, but also form sharp cutting shapes that harm the cells.
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Using living cells form chicken, Luyet and his assistants discovered that they could partly dry the chicken cells, using a mixture of the white part of an egg and glycerin (丙三醇). Some success was obtained. The chicken cells were dried, frozen for a period of time, and then carefully unfrozen. Almost all the cells recovered when they reached normal temperatures.
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