假如生产一双皮鞋的社会必要劳动时间是4小时,售出后收入60元.某一生产者率先提高劳动生产效率一倍,即2小时生产一双,他用4小时生产同样的皮鞋售出收入是(). ["30元","60元","120元","90元"]
党的十七大开幕式的主持人是谁() ["A、李长春","B、吴邦国","C、胡锦涛","D、温家宝"]
失代偿期的表现不包括() ["周围脉搏减弱","意识紊乱","心脏骤停","脏器衰竭","血压低"]
万古霉素属于哪类药物() ["林可霉素类","β-内酰胺类","大环内酯类","多肽类"]
以金酒为酒基的鸡尾酒() ["金菲斯","血腥玛丽","阿拉斯加","新加坡司令"]
不饱和聚酯树脂的固化过程