单项选择题
Your tanker is loaded down to her marks，and you find that she has too much trim by the stern. To adjust the trim，you may（）.
A.add ballast forward
B.load more cargo forward
C.shift bunkers forward
D.All of the above
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相关考题
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多项选择题
随着教育测验兴盛期的结束，在20世纪30年代开始，教育评价的概念被提了出来，其发展经历了（）。
A.测验运动的批评期
B.平衡发展期
C.专业化时期
D.实践时期 -
单项选择题
During the valve overlap period, the exhaust pressure of a turbochargers, four-stroke/cycle diesel engine must be less than the intake manifold pressure to ensure （）
A.effective cylinder scavenging and cooling
B.constant pressure from the turbochargers
C.cooler operation of the exhaust system
D.effective constant pressure for turbocharger operation -
判断题
主轴瓦间隙不均时，将发生过热，偏磨，烧瓦和抱轴等故障。
