The construction of the main propulsion engine lube oil sump should （）
A. have no plating joints of 90
B. retain the lube oil as long as possible before it recirculates through the system
C. provided drain/return lines that are no greater than 24 inches from the pump suction
D. be provided with only a perfectly horizontal bottom
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目前多运营商共建共享室分系统（）方案进行信号合路。
A. 光纤分布系统
B. 无源分布系统+POI合路
C. 有源分布系统+POI合路
D. 光纤分布系统+POI合路
柳宗元《钴鉧潭西小丘记》是如何抒发作者怀才不遇之情的？
下列资产负债表项目，可直接根据有关总账余额填列的是（）。
A. 货币资金
B. 应付工资
C. 存货
D. 应收账款
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