Cooking is an effective way in preserving food because _____.
A、cooking always kills the bacteria in food
B、cooking can make the food become dry
C、the fire in cooking can kill bacteria
D、under the right conditions, cooking will kill bacteria
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试题解析
根据第二段首句“Cooking will usually kill bacteria if the temperature is high enough and long enough”可知,在一定的条件下(即温度够高、时间够长的话),烹饪法能杀死细菌,因此是一种保存食物的有效方法。