车站对旅客违章携带品应拒绝进站或动员旅客办理托运。()
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煤泥及浮选尾煤:刮板机、沉降式离心脱水机、折带式真空过滤机和压滤机或煤泥沉淀池。
A. 正确
B. 错误
油气差异聚集的结果,造成天然气分布在靠近油源区一侧的圈闭中,向倾方向依次为()。
A. 油气藏、油藏、空圈闭
B. 空圈闭、油藏、油气藏
C. 油藏、油气藏、空圈闭
Which of the following is the reason that the metacentric height is a valid measure of only the initial stabilit?().
A. The metacenter does not remain in the same position for large angles of inclination
B. The center of gravity shifts due to inclination
C. The center of gravity shifts above the metacenter as the vessel is inclined
D. The mean draft will change as the vessel is inclined
变量筛选简化回归方程的方法,称为()
A. 方差分析法
B. 回归统计法
C. 回归检验法
D. 逐步回归法