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【单选题】
冬不拉是以下哪个民族的代表性乐器?A.
维吾尔族
B.
哈萨克族
C.
藏族
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皮皮学刷刷变学霸
举一反三
【简答题】Hollow blow mould
【单选题】按晶体场理论,在八面体场中因场强不同有可能产生高自旋和低自旋的电子构型 是......................................................................................................( ) (A) d 1
A.
) d 3
B.
) d 5
C.
) d 8
【单选题】The following is a point to be considered during the design of ingate in a sand mould
A.
Ingate should not be located near a protruding part of the mould to avoid the striking of vertical mould walls by the molten metal stream.
B.
Ingates should preferably be placed along the longitudinal axis of the mould wall.
C.
Ingates should not be placed near a core print or a chill.
D.
All of the above.
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