按下F5键即可在资源管理器窗口中更新信息。
Steady precipitation is typical of（）. ["coming cold weather conditions","a warm front weather condition","high pressure conditions","scattered cumulus cloud"]
对计量误差处置正确的是（）。 ["燃气企业可对计量准确度进行检测鉴定","具有相应资质的计量检测机构才能鉴定计量准确度","在法定范围内的误差不影响使用","一旦发现计量器具误差，停止使用"]
Snow has obliterated surface features and the sky is covered with uniform，altostratus clouds. There are no shadows and the horizon has disappeared. What is this condition called? （） ["Ice blink","Whiteout","Water sky","Aurora reflectio"]
基肥的作用有哪些？如何正确地施用基肥？
举例说明如何进行土壤灭菌和灭虫？
