[填空题] 桥梁结构静载试验的加载设备可根据加载要求及具体条件选用，一般有两种加载方式，即（）和（）。

科技档案工作基本原则是按照集中统一管理科技档案的基本原则，建立、健全科技档案工作，达到科技档案（）的要求。 银汞合金充填术要制洞，主要因为：（） ["充填料粘结力差","充填料有体积收缩","充填料强度不够","便于去龋"] 总结一定要重点突出，不需要兼顾一般。 王田制 Why were the French troops in Canada defeated by the British during the Seven Years.War?（） ["Because they were not used to the weather in Canada.","Because they did not get support from the local people.","Because they did not receive the supplies they needed so badly.","Because the British had larger and better settlements in Canada."] 桥梁结构静载试验的加载设备可根据加载要求及具体条件选用，一般有两种加载方式，即（）和（）。