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【单选题】
直流电动机的机械特性是（）之间的关系。A.
电源电压与转速
B.
电枢电流与转速
C.
励磁电流与电磁转矩
D.
电机转速与电磁转矩
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【简答题】二副在驾驶应张贴: 1磁罗经自差表;2重要仪器的操作规程;3驾驶,轮机联系制度;4船舶操纵性能明细表A. ①②③ B. ①②③④ C. ②③④ D. ①②④
【单选题】(8) They can be damp and cold. But with a growing number of men seeing the shed as a home from home, research claims the solitude(独处) it provides at the bottom of the garden could actually be good for...
A.
1A
B.
B
C.
C
D.
D
【单选题】What was the purpose of Ana’s call?
A.
to find out exactly what Patricia has done
B.
to find out what Josh has done
C.
to find out more about her office visit
D.
to plan Patricia’s visit to Ana’s office
【简答题】二副在驾驶应张贴 1. 磁罗经自差表 2. 重要仪器的操作规程 3.驾驶,轮机联系制度 4.船舶操纵性能明细表A. 1-4 B. 1-3 C. 1,3,4， D. 2-4
【单选题】The health of garden plants depends on the soil _____ --the proper balance of mineral pieces, organic matter, air and water.
A.
construction
B.
conservation
C.
corporation
D.
composition.
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