That farmer has many ___ on the farm.
A.geeses
B.gooese
C.goose
D.geese
答案:D
分配放大器、分支器、分配器当需要安装在室外时,应采取防雨措施,距地面应不小于( )。
A.1.5m B.1.8m C.2m D.2.5m
轧制力矩等于轧制压力与()的乘积。