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【单选题】
采用滴灌进行肥施肥时,其滴头的流量一般不大于( )L/h。A.
3
B.
6
C.
9
D.
12
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皮皮学刷刷变学霸
举一反三
【单选题】Mr. Pontetlier felt extremely frustrated because______.
A.
his wife overslept
B.
his wife greeted late
C.
his wife was indifferent to his talk
D.
his wife showed too much interest in his talk
【简答题】窗的主要作用是 、 、和
【多选题】切削用量三要素是金属切削加工中非常重要的参数,它们直接影响:
A.
切削力的大小
B.
切削热和切削温度
C.
刀具磨损和刀具耐用度
D.
数控程序编程
E.
生产率、加工成本和加工质量
【简答题】门窗的主要作用是( )
【简答题】A．Some people didn't support him. B．Some people are jealous of him. C．His wife wanted him to give up his business. D．He has no confidence to run his business any more.
【简答题】窗的主要作用是 、 、 。
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