关于公司型基金和契约型基金，下列说法正确的是（）。

A．A.Double interference

B．B.Co-channel interference

C．C.Adjacent channel interference

D．D.Reflected interference

E．E.Timing interference

As shown in the figure , two coherent waves with wavelengthmeet at point P. The initail phase of the wave isat point, and the distance form pointto point P is. The initial phase of the wave isat the point, and the distance form pointto point P is. Let k to be zero, positive or negative integer, then the condition for point P is the maximum interference is ().

A、

B、

C、

D、

A．A.Increases channel utilization, cost ,and interference

B．B.Increases capacity and cost, but decreases interference

C．C.Increases capacity, but decreases cost and interference

D．D.Increases capacity, cost, and interference

E．E.Increases channel utilization and cost, but decreases interference

电离干扰(ionization interference)

基因干预(gene interference)

A．crossing over and independent assortmen

B．crossing over and chromosome interference

C．chromosome interference and independent assortment

D．somatic-cell hybridization and chromosome interference

E．complete linkage and chromosome interference

RNA干扰(RNA interference，RNAi)

RNA干涉(RNA interference，RNAi)