【简答题】建立一个千兆以太网( 1Gbps ),电缆长为 2km,其中无中继器。信号在电缆中 的传输速度为200000km/s. 问帧的最小长度为多少?
【单选题】At the left part electrode showed in the present image, it can be observed indicator electrode known in the group of
A.
metallic indicator electrode
【单选题】a ship is said to drag if the anchor ____
A.
will prevent the movement of the ship
B.
will not move over the bottom
C.
will hold her in position
D.
will not hold her in position
【单选题】How does Helen think about Benjamin ’ s résumé
A.
His résumé is not clear
B.
His résumé is too short
C.
His résumé is too long
D.
His résumé covers all the information required
【单选题】The pH electrode belongs to ( ).
A.
A combination electrode composed of aglass electrode and a calomel electrode
B.
A glass indicator electrode
C.
A saturated calomel reference electrode