题目内容

海船船员适任证书的“限制项目”规定适任证书所能适用的船舶和主推进动力装置种类及特殊设备有哪些?

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推管推出机构对软质塑料如聚乙烯、软聚氯乙烯等不宜用单一的推管脱模,特别对薄壁深筒形塑件,需用()推出机构。

A. 推板
B. 顺序
C. 联合
D. 二级

历史记载,伊尹与()有关、汤液的发明与使用、使单味药向()转变,促进了()的诞生,为临床用药经验进一步研究和总结提供条件。

一般碱性炉渣对钢液的润湿能力比酸性炉渣()。

As a frame leaves a Layer 3 device,the Layer 2 encapsulation information is changed from what it was when it entered the device. For what two reasons can this happen?()

A. The data is moving from 10BASE-TX to 100BASE-T
B. The WAN encapsulation type has changed.
C. The data format has changed from analog to digital.
D. The source and destination hosts are in the same subnet.
E. The source and destination MAC addresses have changed.

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