If we had been informed in time, we ______ them for you.
A.would have reserved B.would reserve
C.will reserve D.had reserved
第3题
A.热应力随约束程度的增大而减小
B. 热应力与零外载相平衡,不是一次应力
C. 热应力具有自限性,屈服流动或高温蠕变可使热应力降低
D. 热应力在构件内是不变的
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