These satellites constantly transmit an identifying .
举一反三
- CATEGORY A EPIRB’s transmit on frequencies that are monitored by（）. A: orbiting satellites in space B: commercial radio stations C: private，commercial，and military aircraft D: ordinary radio statio
- You____your books about. A: constantly leave B: are constantly leaving C: constantly left D: have constantly left
- The 24 satellites in the Global Positioning System ( GPS ) are synchronous satellites, and they appear to be stationary to an observer on the earth.
- According to the author, parents ______. A: are very important to experts in identifying gifted children B: are not very reliable in identifying gifted children C: are not very reliable in identifying gifted children D: are more helpful than teachers in identifying gifted children
- The word "problem" in the fourth paragraph refers to the fact that ______. A: CT scans are one of the biggest bandwidth consumers B: there are not enough mobile phones for distributing medical intelligence C: communications satellites can only cope with the short-term needs during disasters D: bandwidth is not adequate to transmit complex medical images around the world