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【简答题】
下列金融工具中属于直接融资工具的有（ ）。
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皮皮学刷刷变学霸
举一反三
【简答题】双向板指的是板的长边与短边的比值小于等于( )。
【单选题】On a half-duplex Ethernet LAN, two hosts attempt to send data simultaneously, resulting in a collision. Following this collision, what will the hosts do? (Select all valid answers)
A.
The destination host sends a request to the source for retransmission.
B.
The jam signal indicates that the collision has been cleared.
C.
The hosts will attempt to resume transmission after a time delay has expired.
D.
An electrical pulse indicates that the collision has cleared.
E.
The router on the segment will signal that the collision has cleared.
F.
The hosts will do nothing, as the higher layers are responsible for data error correction and re-transmission.