【判断题】【消耗次数:1】
天然花岗岩特性为密度大、耐久性好、强度高
正确
错误
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相关题目
【判断题】 可用性和耐久性。
①  正确
②  错误
【判断题】 水泥混凝土有较高的抗拉、抗压强度,较好的耐久性。
①  正确
②  错误
【单选题】 高耐久性指该项目主要构件设计使用年限应大于()年。
①  40
②  50
③  20
④  30
【判断题】 高耐久性混凝土适用于对耐久性要求高的各类混凝土结构工程,但不适用于设计使用年限100年的混凝土结构工程。
① 
② 
【多选题】 混凝土的耐久性通常包括()。
①  抗冻性
②  抗渗性
③  抗侵蚀性
④  抗老化性
⑤  抗碱-集料反应
【单选题】 以下哪些属于混凝土的耐久性?
①  抗冻性
②  和易性
【单选题】 下列哪种状态应按耐久性极限状态设计?
①  结构作为刚体失去平衡
②  因过度的塑性变形而不适于继续承载
③  影响耐久性能的局部损坏
④  构件丧失稳定
【判断题】 混凝土配合比设计时需要满足工作性、强度、耐久性和经济性四个方面的要求。
①  正确
②  错误
【判断题】 砌体只要保证了强度和稳定性的要求,就能够满足其耐久性的要求。()
①  正确
②  错误
【判断题】 在保证砼强度与耐久性的前提下,尽量选用较大的水灰比,以节约水泥( )。
①  正确
②  错误
随机题目
【单选题】 3. Few of them hurt themselves in the accident last night, ____ ?
①  but
②  and
③  though
④  so
【单选题】 9.The old farmer, ____the badly injured and burnt soldier, came out of the burning farmhouse, calling continuously for help.
①  supporting
②  having supported
③  being supported by
④  being supported
【单选题】 5.____the front door____, he had to enter the room through the back door.
①  Seen, painted
②  Seeing, painted
③  Being seen, being painted
④  Seeing, being painted
【单选题】 16. As I will be away for at least a year, I’d appreciate____ from you now and then so that I can know how everyone is getting along.
①  having heard
②  to hear
③  hearing
④  beingheard
【单选题】 7.He looked around and caught a man____his hand into the pocket of a passenger.
①  put
②  to be put
③  to put
④  putting
【单选题】 14.The thief fell to the ground,his left foot ____and blood ____down from his mouth.
①  breaking; running
②  broken; running
③  breaking; run
④  broken; run
【单选题】 18.- Did you get a dictionary?- No, I _____, but there were not any _____.
①  tried; to be left
②  had tried to; leaving
③  tried to; left
④  had tried; have left
【单选题】 4.____the diamond, he had to look for a place to hide it.
①  Having stolen
②  Having been stolen
③  Stolen
④  Stealing
【单选题】 12.You can’t imagine what great trouble they have ____the problem____.
①  to solve; being talked about
②  solving; discussing
③  to solve; to talk about
④  solving; being discussed
【单选题】 6.And there, almost____in the big chair, sat her little brother, who never had to be told to keep quiet.
①  having lost
②  losing
③  to be lost
④  lost