For February, the cost components of a picture frame include ¥0.40 for the glass, ¥0.67 for the wooden frame, and ¥0.83 for assembly. The assembly desk and tools cost ¥570. Two hundred fifty frames are expected to be produced in the coming year. What cost function best represents these costs? A: y = 1.90 + 570X B: y = 570 + 1.07X C: y = 570 + 1.90X D: y = 1.07 + 570X
For February, the cost components of a picture frame include ¥0.40 for the glass, ¥0.67 for the wooden frame, and ¥0.83 for assembly. The assembly desk and tools cost ¥570. Two hundred fifty frames are expected to be produced in the coming year. What cost function best represents these costs? A: y = 1.90 + 570X B: y = 570 + 1.07X C: y = 570 + 1.90X D: y = 1.07 + 570X
My room number is (570 / 517).
My room number is (570 / 517).
T<570℃,Fe+O2→Fe2O3+Fe3O4 ,易氧化。
T<570℃,Fe+O2→Fe2O3+Fe3O4 ,易氧化。
T>570℃,Fe+O2→FeO+Fe2O3+Fe3O4,不易氧化。
T>570℃,Fe+O2→FeO+Fe2O3+Fe3O4,不易氧化。
The Academic Word List contains 570 words. A: 正确 B: 错误
The Academic Word List contains 570 words. A: 正确 B: 错误
中国大学MOOC: The Academic Word List contains 570 words.
中国大学MOOC: The Academic Word List contains 570 words.
高速钢W18Cr4V的回火工艺参数为:()。 A: 150~200℃(一次回火) B: 150~200℃(三次回火) C: 550~570℃(三次回火) D: 550~570℃(一次回火)
高速钢W18Cr4V的回火工艺参数为:()。 A: 150~200℃(一次回火) B: 150~200℃(三次回火) C: 550~570℃(三次回火) D: 550~570℃(一次回火)
高速钢W18Cr4V的回火工艺参数为:()。 A: A150~200℃(一次回火) B: B150~200℃(三次回火) C: C550~570℃(三次回火) D: D550~570℃(一次回火)
高速钢W18Cr4V的回火工艺参数为:()。 A: A150~200℃(一次回火) B: B150~200℃(三次回火) C: C550~570℃(三次回火) D: D550~570℃(一次回火)
高炉中铁氧化物在小于570℃时,还原顺序为()。
高炉中铁氧化物在小于570℃时,还原顺序为()。
高速钢在550~570℃下进行三次回火,回火后的组织为________
高速钢在550~570℃下进行三次回火,回火后的组织为________