园林树木栽培的肥料管理中，夏季追肥多采用幅射状沟施法。
参考答案：错
--- I wonder how long you ____ in Hawaii.
--- Just for the weekend, then I had to attend a conference in Los Angeles.
A．will stay
B．stayed
C．have stayed
D．were staying
切印装置（）系统的气压低于要求值，又调整无效，可能是供气系统停气。
A.输送
B.烘干
C.叠放
D.计数
