填空题Proofread the passage as required. Each indicated line contains a maximum of
one error. Correct the passage in the following way: for a correct line, put the
sign "√" in the corresponding blank; for a wrong word, underline the wrong word
and write the correct one in the blank; for a missing word, mark the position of
the missing word with the sign "∧" and write the word you believe to be missing
in the blank; for an unnecessary word, cross the unnecessary word with the sign
"—" and put the word with the sign "—" in the blank. Write the answers on the
answer sheet. 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
82. ______ in an oven or digested within the body. The cooking
of meat and vegetables induce 83. ______ chemical changes,
making it more delicious; similarly the leavening action of
84. ______ baking powder is a straightforward chemical change, as is
the conversion of starch into sweet sugars by digestion.
Cookery is a science requiring a knowledge of chemistry.
85.
______ 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 painstaking
86. ______ research. It is therefore essential for trained
cookers to understand
87. ______ chemical science in order to
appreciate the chemistry nature of foods
88. ______ and the changes achieving on cooking.
Homeworkers should also
89. ______ know cleansing agents and textiles
used in the home and how the latter
90. ______ responds to the effects of heat, light, water, and
chemical cleansing agents. 91. ______