皮皮学，免费搜题
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搜题
【单选题】
( )主要作用是抑制外的褐变。A.
抗氧化物
B.
糖
C.
无机盐
D.
有机物
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Our monitor requested that ________. [ ]
A.
all the class studied more carefully the problem
B.
the problem was more carefully studied
C.
with great care the problem could be studied
D.
all the class study the problem more carefully
【简答题】A．He liked to drink two cups of coffee before the professor's class. B．One cup of coffee is enough for him to keep awake in the class. C．The professor's class is very interesting. D．The professor's cl...
【单选题】---_____the boys in our class enjoy ________the World Cup? ---Yes, they____.
A.
Do , watching, do
B.
Do , to watch, are
C.
Does, watching, does
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