举例说明如何进行土壤灭菌和灭虫？
The fuel booster pump and steam to fuel heater, together with fuel pipe heater tracer line should be shut off as soon as the （） order is acknowledged. ["finished with engines","stop","stand by","full ahead"]
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"]
怎样选择苗圃地？
在Windows资源管理器窗口中可以只列出文件名。
人们为什么要重视仪表？
