When the movement of engine is no longer required the pilot usually gives the order like this（） . ["Stop engine","Nothing to port","Finish engines","Finished with engine"]
简述边缘海的可能形成机理。
郊区和农村：定向天线选用水平半功率波瓣宽度为（），垂直半功率波瓣宽度为（）的天线，天线的增益在（）之间。全向天线采用垂直半功率波瓣宽度为（），增益在（）之间的天线。
在推动我国风险投资主体多元化上的正确做法是（） ["鼓励有条件的大型企业设立风险投资部门","鼓励大型金融机构进入风险投资业","逐步减少政府资金在风险投资业所占比例","陆续出台鼓励天使投资的政策"]
When a tug is pulling on a hawser at right angles to the ship，and the pilot wants to come ahead or astern on the ship’s engine，care must be taken that the pilot（）. ["does not break the towline","does not get too much way on the vessel","keeps a steady course so the towline will remain tight","turns the ship toward the direction of pull"]
简述何谓焦炉老化？
