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当前学科：1A411000建筑结构与构造
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非金属材料风管
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在双层床运行中应注意哪些问题？
受要约人在承诺期限内发出承诺，按照通常情形能够及时到达要约人，但因其他原因致使承诺到达要约人时超过承诺期限的，除要约人及时通知受要约人因承诺超过期限不接受该承诺的以外，该承诺有效。（）
首选用于治疗溃疡疮口过小，脓水不易排出，或已形成瘘管、窦道的外科手术疗法是（）
设备采购合同有关交付设备条款欠缺或不明确的，双方可另行协商，出卖人按补充协议履行交付设备义务；双方不能协商一致时，按以下（）法律规定交付设备。
判断肾实质损伤严重程度哪项检查最有价值（）
比奈智力测验
江西诗派的诗学主张是()。
Trying to Find a Partner One of the most striking findings of a recent poll in the UK is that of the people interviewed， one in two believes that it is becoming more difficult to meet someone to start a family with. Why are many finding it increasingly difficult to start and sustain intimate relationships？ Does modern life really make it harder to fall in love？ Or are we making it harder for ourselves？ It is certainly the case today that contemporary couples benefit in different ways from relationships. Women no longer rely upon partners for economic security or status. A man doesn't expect his spouse to be in sole charge of running his household and raising his children. But perhaps the knowledge that we can live perfectly well without a partnership means that it takes much more to persuade people to abandon their independence. In theory， finding a partner should be much simpler these days. Only a few generations ago， your choice of soulmate （心上人） was constrained by geography， social convention and family tradition. Although it was never explicit， many marriages were essentially arranged. Now those barriers have been broken down. You can approach a builder or a brain surgeon in any bar in any city on any given evening. When the world is your oyster （牡蛎） ，you surely have a better chance of finding a pearl. But it seems that the old conventions have been replaced by an even tighter constraint： the tyranny of choice. The expectations of partners are inflated to an unmanageable degree： good looks， impressive salary， kind to grandmother， and right socks. There is no room for error in the first impression. We think that a relationship can be perfect. If it isn't， it is disposable. We work to protect ourselves against future heartache and don't put in the hard emotional labor needed to build a strong relationship. Of course， this is complicated by realities. The cost of housing and child-rearing creates pressure to have a stable income and career before a life partnership. Which of the following was NOT a constraint on one's choice of soulmate in the old days？（）
光周期作用
施工升降机国家标准中()是强制性标准。