1931年,毛泽东指出在根据地土地革命中“保护中小工商业者”的根本原因是()
A. 保留小私有制,发展根据地经济
B. 有利于团结一切反封建力量
C. 中小工商业者是革命主力军
D. 工商业者不属于土地革命对象
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小料钟制造时是铸成一体的。
A. 正确
B. 错误
脱丁烷塔塔釜可能聚合的原因()。
A. 塔釜温度高
B. 塔釜温度低
C. 液位高
D. 液位低
General, the best way for replacement of lamp is ().
A. after the point is reached at which the failures begin to increase rapidly
B. before the point is reached at which the failures begin to increase rapidly
C. before the point is reached at which the failures begin to increase slowly
D. after the point is reached at which the failures begin to increase slowly