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【判断题】
PI控制规律指的是比例、积分A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】Their classroom is _____ than ours, that is to say, their classroom is as small as ours.
A.
much bigger
B.
much smaller
C.
no bigger
D.
less small
【单选题】听力原文： (32)World Environment Day was established by the United Nations General Assembly in 1972 to mark the opening of the Stockholm Conference on the Human Environment. (33)World Environment Day can b...
A.
In 1992.
B.
In 2000.
C.
In 2004.
D.
In 1972.
【单选题】听力原文：M: Good evening and welcome to our program. Our guest is Mrs. Green, who is an expert in the field of environ mental protection. Welcome to our program, Mrs. Green. W: Thank you. M: Well, we hear...
A.
Keys to paper recycling.
B.
Importance of recycling.
C.
Keys to recycling improvement.
D.
Technological progress in recycling.
【简答题】证券公司与证券交易所同为银行金融机构，因此二者的性质并无本质区别。
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