公路沉入桩的连接有哪些要求?

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问题:

公路沉入桩的连接有哪些要求?

考点:公路施工技术规范桥涵施工技术规范桥涵施工技术规范题库
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(5分)下列说法中正确的是          

A.熵是物体内分子运动无序程度的量度

B.若容器中用活塞封闭着刚好饱和的一些水汽,当保持温度不变向下缓慢压活塞时,水汽的质量减少,压强不变

C.多晶体具有规则的几何外形,物理性质具有各向异性

D.农民在干旱天气里锄松土壤是为了破坏土壤中的毛细管E.用油膜法测出油分子的直径后,要测定阿伏加德罗常数,只需再知道油的密度即可

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Allen: I’ve never been a big fan of the bears, especially the vacation show. On my last trip to Disneyland(1999) we passed it by, because we didn’t want to spend the time on something we didn’t really enjoy. If we’d known it would be closed by our next visit, I’m sure we would have watched it one more time. I was just making the point that it wasn’t until Disney announced the closing that this feeling suddenly sprang(弹跳) up for the Country Bear show at Disneyland.
But I think the idea of keeping some attractions open forever regardless of the number of visitors it gets is a mistake. We all have great memories of the Bears, but clearly very few kids today (or I should say families today) are making those same memories from this show. That may be a sad fact, but it’s a fact. For whatever reason, the show doesn’t pull in the numbers. Isn’t it right to use the Country Bear space to bring in more popular attraction so that more kids today can make those magic memories of an attraction they like Otherwise aren’t we just telling the kids today that they "have to" make great memories of the Bears, when it’s obvious that the kids themselves are not enjoying the Bears as we did
Roger: I am very disappointed that they have decided to retire the Country Bear Playhouse. I remember going to the show as a child, and still enjoying it as a teenager, and now as a young adult. It is true that there aren’t a lot of shows left at DL and with this one closing even less. Being at DL does require a lot of walking, and it is nice to have an attraction that is a place to sit and enjoy a good show. I understand that DL has to develop, but there has to be some history to the Disneyland that Walt Disney first designed. There should be some parts of DL that just never go away and this is one of them. By the time I have children it looks like there won’t be any attractions that I can say. I went as a child at the rate they are going.
Now the Bears are leaving. What I want to say is: stop trying to compete with everyone! DL is the best, because of attractions like the Country-Bears. If DL insists on destroying all of its magic to make way for the latest, well, then it might as well be just another theme park.

What news might get people talking about the problem of the Country Bears

A.The Country Bear Playhouse will be closed.

B.There will be a new attraction for our guests at Disneyland.

C.The number of visitors to the Country Bear Playhouse is falling.

D.The Bears will retire because of old age and can’t give shows any mor

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如图所示,间距为L、电阻为零的U形金属竖直轨道,固定放置在磁感应强度为B的匀强磁场中,磁场方向垂直纸面里。竖直轨道上部套有一金属条bc,bc的电阻为R,质量为2m,可以在轨道上无摩擦滑动,开始时被卡环卡在竖直轨道上处于静止状态。在bc的正上方高H处,自由落下一质量为m的绝缘物体,物体落到金属条上之前的瞬间,卡环立即释改,两者一起继续下落。设金属条与导轨的摩擦和接触电阻均忽略不计,竖直轨道足够长。求:

(1)金属条开始下落时的加速度;

(2)金属条在加速过程中,速度达到v1时,bc对物体m的支持力;

(3)金属条下落h时,恰好开始做匀速运动,求在这一过程中感应电流产生的热量。

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如果子类中覆盖了父类中的同名方法,则在子类中调用父类中的同名方法时用关键字 【7】 ;在一个类的内部可以直接调用本类的对象,也可通过关键字this来调用。

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在公开出版物中,当前的()反映的信息内容可能最新。

A、学位论文

B、标准文献

C、期刊论文

D、报纸文献

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