船舶强度大,马力大,稳性和浮性较好,但船体较小的船舶称为() ["海洋开发船;","航标船;","拖船;","破冰船。"]
大脑皮层上的枕叶是() ["听觉中枢","视觉中枢","言语中枢","嗅觉中枢"]
贷款“三见面”原则是指()。 ["信贷人员见面","借款人见面","担保人见面","领导见面"]
冶炼75硅铁,要求硅石中Al2O3应小于() ["0.01%","1.0%","0.02%","0.20%"]
加玻璃布的管道外壁环氧煤沥青防腐层,防腐层的抗冲击性()。 ["大大提高","提高","并不提高","降低"]
衡量距离测量的精度为什么采用相对误差?