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【判断题】
矩阵A的秩大于A的子矩阵的秩A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】听力原文：W: I don’t understand how you got a ticket. I always thought you drived carefully. M: I usually am, but I thought I could make it before the light changed. Why did the man receive a ticket?
A.
He was speeding.
B.
He ran a red light.
C.
He went through a stop sign.
D.
He turned a comer too fast.
【单选题】听力原文：W: I don't understand how you got a ticket. I always thought you drive carefully. M: I usually am, but I could make it before the light changed. Why did the man receive a ticket?
A.
He was speeding.
B.
He ran a red light.
C.
He went through a stop sign.
D.
He turned a corner too fast.
【简答题】桥面系包括哪些部分?各部分的作用是什么? 2.桥面铺装的功能是什么?有哪些类型? 4.为什么要设置伸缩装置?
【简答题】桥面伸缩装置有哪些类型?
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