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若复数 为纯虚数（ 为虚数单位），则实数 ．
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【单选题】关于铸件的冷却方式，说法不正确的是（）
A.
纯钛金属则采取缓慢降温冷却
B.
18-8不锈钢，待金属凝固后立即投入冷水中冷却
C.
以上说法均不正确
D.
包括快速降温冷却和缓慢降温冷却
E.
中熔合金铸件待合金凝固后约1分钟，将整个铸圈放入室温水中冷却
【简答题】在《推进领导干部能上能下若干规定(试行)》中提到“对有关领导干部实行问责的方式”有哪些?
【单选题】关于铸件的冷却方式,说法不正确的是
A.
纯钛金属则采取缓慢降温冷却
B.
18-8 不锈钢，待金属疑周后立即投入冷水中冷却
C.
中熔合金铸件待合金凝固后约1分钟，将整个铸圈放入室温水中冷却
D.
包括快速降温冷却和缓慢降温冷却
E.
以上说法均不正确
【简答题】The festival is a memorable day in life. All ethnic groups and regions have their own festivals. In China there are many 1. _______(tradition) festivals, among which the Spring Festival is the most im...
【简答题】One family from Japan settled at the turn of the 20th century near San Francisco. They grew roses and trucked them into San Francisco three mornings a week. The other family was from Switzerland who...
【简答题】《推进领导干部能上能下若干规定(试行)》中提出要____。
【简答题】Passage A Many agers feel that the most important people in their lives are their friends. They believe that their family members don' t know them as well as their friends do. In large families, i...
【单选题】关于铸件的冷却方式，说法不正确的是（）
A.
包括快速降温冷却和缓慢降温冷却
B.
18-8不锈钢，待金属凝固后立即投入冷水中冷却
C.
中熔合金铸件待合金凝固后约1分钟，将整个铸圈放入室温水中冷却
D.
纯钛金属则采取缓慢降温冷却
E.
以上说法均不正确
【简答题】Many agers feel that the most important people in their lives are their friends. They believe that their family members, especially their parents, don't know them as well as their friends do. In l...
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