扦插繁殖有硬枝插、绿枝插、叶插、（）、（）等方法。
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Which of the following correctly describe steps in the OSI data encapsulation process?（）
A. The transport layer divides a data stream into segments and may add reliability and flow control information.
B. The data link layer adds physical source and destination addresses and an FCS to the segment.
C. Packets are created when the network layer encapsulates a frame with source and destination host addresses and protocol-related control information.
D. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
E. The presentation layer translates bits into voltages for transmission across the physical link.
若方位分罗经设置于驾驶室外的两翼甲板上，而该甲板顶上是遮阳的，则应另在驾驶室顶上的露天甲板处增设一个分罗经。（）
A. 正确
B. 错误
在“推优”工作中，应以团的委员会为单位，有计划地向党组织推荐经考察已具备条件的入党积极分子。
A. 正确
B. 错误
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