城市规划区内的村庄、集镇的规划制定和实施应该依据( )。

A．《村庄和集镇规划建设管理条例》

B．《城市规划法》

C．《建筑法》

D．《建制镇规划建设管理办法》

A major advantage of the NAVTEX system when compared to other systems is that（）.

A.the information can be received on an ordinary FM radio

B.warnings are printed out for reading when convenient

C.broadcasts are at scheduled times

D.a low frequency band is used for long distance transmission