停车车位的不知方式按汽车纵轴线与通道的夹角关系有(),垂直停放,斜向停放,三种类型。
参考答案:平行停放
IP multicasting is a set of technologies that enable efficient delivery of data to many locations on a network. Rather than making multiple copies of a message intended to be distributed to multiple recipients at the (71) of origin of a message, multicasting initially sends just one (72) and does not copy it to the individual recipients until it reaches the closest common point on the network, thereby (73) the bandwidth consumed. Network performance is significantly (74) because it isn’t bogged down with the processing and transmission of several large data fries; each receiving computer doesn’t have to (75) the transmitting server for the file.
A.point
B.bottom
C.head
D.sight
变频器的分类,各有什么特点?