【单选题】【消耗次数：1】
如果结构对称、荷载反对称，则轴力图、弯矩图反对称，剪力图对称，在对称轴上轴力、弯矩均为零。（ ）
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②
错误
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ends
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results
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effects
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causes
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plan
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campaign
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procedure
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policy
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purpose
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intention
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aim
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meaning
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were to do
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do
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had done
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was to do
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If he ___ he ___ that food.
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was warned; would not take
②
had been warned; would not have taken
③
would be warned; had not taken
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would have been warned; had not taken
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while
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that
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when
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that; had to leave
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that; should leave
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①
that
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which
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【判断题】
I have waited for two weeks impatiently and finally the order was cancelled.
①
正确
②
错误