扩频通信的技术特点包括:()
A.抗干扰能力强
B.可进行多址通信
C.保密性好
D.抗多径干扰
参考答案:A, B, C, D
(2013·陕西重点中学高三二模)We pursue happiness, thinking one day we will find it. But ________ it by seeking it.
A.rarely will we find
B.rarely we will find
C.rarely will find we
D.rarely find we will
种子生产、经营许可证由市或者区、县种子管理机构核发,但从事进、出口业务的由国务院林业行政主管部门核发,有效期为三年。()