简述系统自然观的基本内容。
You have a computer that runs Windows XP Professional. You attempt to install a device driver for a new printer and receive the error message shown in the exhibit. You need to ensure that you can install the device driver. What should you do?（） ["Add your user account to the local Power Users group.","Add your user account to the local Administrators group.","From the Device Manager, uninstall the current display driver.","From the System properties, modify the Driver Signing option."]
烧死的内部征象有哪些？
服务器选型的原则
关于周转性材料消耗量的说法，正确的是（）。 ["周转性材料的消耗量是指材料使用量","周转性材料的消耗量应当用材料的一次使用量和摊销量两个指标表示","周转性材料的摊销量供施工企业组织使用","周转性材料的消耗与周转使用次数无关"]
试述直接与空气形成爆炸性混合物的特性。
