Microwave communication uses high-frequency (71) waves that travel in straightlines throughthe air. Because the waves cannot (72) with the curvature of the earth, they can be (73) only over short distance. Thus, microwave is a good (74) for sendingdata between buildings ina city or on a large college campus. For longer distances, the wavesmust be relayed by means of"dishes" or (75) . These can be installed on towers, highbuildings, and mountain tops.

A．repeaters

B．radars

C．telephones

D．antennas

一台路由器的路由表如下所示。该路由器在接收到目的地址为130.3.25.8的数据报时，它应该将该数据报投递到______。