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【单选题】
3月初，某轮胎企业为了防止天然橡胶原料价格进一步上涨，买人7月份天然橡胶期货合约100手（每手10吨），成交价格为24000元／吨，对其未来生产需要的1000吨天然橡胶进行套期保值。当时现货市场天然橡胶价格为23000元／吨。之后天然橡胶未涨反跌。至6月初，天然橡胶现货价格跌至20000元／吨。该企业按此价格购入天然橡胶现货1000吨，与此同时，将天然橡胶期货合约对冲平仓，成交价格为21000元／吨。该轮胎企业的盈亏状况为（）。
A.
盈亏相抵
B.
盈利200元／吨
C.
亏损200元／吨
D.
亏损400元／吨
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【单选题】In a typical riser-gated casting system, component 1 and 2 depict ( )
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【单选题】A riser is an extra void created in the mold to contain ( ) molten material.
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【判断题】设【图片】为n阶方阵，则【图片】是n阶对称阵。
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【单选题】improve or get worse?
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【简答题】Riser is an void created in the mold
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【单选题】The joint of the riser in a marine riser system that compensates for heave，the up-and-down motion of a floater，is the（）.
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【单选题】In a typical riser-gated casting system, component 1 and 2 depict ( )
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sprue and runner
B.
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【单选题】Americans' use of cell phones has increased so quickly that wireless networks are becoming overloaded, causing a growing number of customers to complain about calls that are inaudible or are cut off o...
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【单选题】A riser is an extra void created in the mold to contain ( ) molten material.
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effective
B.
adhesive
C.
relative
D.
excessive
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【判断题】设【图片】为n阶方阵，则【图片】是n阶对称阵。
A.
正确
B.
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【单选题】improve or get worse?
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【简答题】Riser is an void created in the mold
查看完整题目与答案