[名词解释] 食物链(Food Chain)
[名词解释] 食物嵌塞 food impaction
[单选题]食物过敏(food allergy,FA)是由特殊食物蛋白引起的异常或过强的免疫反应。食物过敏的易感年龄是A.学龄前期B.婴儿期C.幼儿期D.新生儿期E.学龄期
[单选题]Is the food in fast food restaurants always ready before the customers order it?A.Yes,it is.B.N0,it is seldom ready.C.Yes,it is cooked to order.D.N0,not always,but usually.
[名词解释] 罐头食品(Canned Food/Tinned Food)
[名词解释] WWW(World Wide Web)万维网