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【简答题】
单向板肋梁楼盖按弹性理论方法计算连续梁的内力时，其活荷载的不利布置规律（）。 A. 若需求某跨跨中最大正弯矩时，除了必须在该跨布置活荷载外，还须每隔一跨布置活荷载; B. 若需求某跨跨中最大负弯矩时，除了必须在该跨布置活荷载外，还、右两相邻跨布置活荷载，然后再隔跨布置活荷载; C. 若需求某支座截面处最大负弯矩时，该支座左、右两跨均布置活荷载，然后隔跨布置活荷载; D. 若儒求某支座截面处最大剪力时，该支座左、右两跨均布置活荷载，然后隔跨布置活荷载;
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A.
正确
B.
错误
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【单选题】Choose the word or phrase that is closest in meaning to the underlined part. Early we introduced the concept that the identity of an amplitude modulated message signal may under certain circumstances ...
A.
values of the message signal taken at regular intervals
B.
formally obtained message samples
C.
samples of the message produced in a specific manner
D.
samples of the regularly obtained message
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【简答题】To have a good knowledge of the marketing concept, we should be aware of the fact that ________
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