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Chemistry is the study of the behavior and composition of matter. All foods are made up of chemical substance which undergoes
Chemistry is the study of the behavior and composition of matter. All foods are made up of chemical substance which undergoes
admin
2013-06-12
43
问题
Chemistry is the study of the behavior and
composition of matter. All foods are made up of
chemical substance which undergoes chemical
changes when cooking in an oven or digested 【1】______
within the body. The cooking of meat and
vegetables induce chemical changes, making 【2】______
it more delicious; similarly the leavening action of【3】______
baking powder is a straightforward chemical change,
as is the conversion of starch into sweet sugars
by digestion.
Cookery is a science requiring for knowledge 【4】______
of chemistry. This is evident from the variety of
cooking products and food additives available
as cooking oils, fats, colorings, sweeteners,
tenderizers, flavorings, screaming agents, preservatives,
etc. Each is carefully prepared before 【5】______
painstaking research.
It is therefore essential for trained cookers to 【6】______
understand chemical science in order to appreciate
the chemistry nature of foods and the changes 【7】______
achieving on cooking. Homeworkers should also 【8】______
know cleansing agents and textiles used in the 【9】______
home and how the latter responds to the effects 【10】______
of heat, light, water, and chemical cleansing agents.
【M9】
选项
答案
在know后加介词about。
解析
及物动词know意为“认识,知道”,know about才能表达“对……有所了解”之意,例如.What one knows is,in youth,of little moment; they know enough who know how to learn.一个人年轻时懂得的事情无关紧要,重要的是要懂得如何去学习。Does all this check with what you know about him?所有这些情况与你对他的了解相符合吗?
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专业英语八级
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