《保险法》规定，对于采用保险人提供的格式条款订立的保险合同，保险人与投保人、 被保险人或者受益人有争议时，人民法院或者仲裁机关应当做有利于（）的解释。

A．被保险人或受益人

B．保险人

C．第三者

D．投保人

Although a given waveform may contain frequencies over a very broad range, as a practical matter any transmission system will be able to accommodate only a limited band of （） . This, in turn, limits the data rate that can be carried on the transmission （） . A square wave has an infinite number of frequency components and hence an infinite （） .However, the peak amplitude of the kth frequency component, kf, is only 1/k, so most of the （） in this waveform is in the first few frequency components. In general, any digital waveform will have （） bandwidth. If we attempt to transmit this waveform as a signal over any medium, the transmission system will limit the bandwidth that can be transmitted.

A square wave has an infinite number of frequency components and hence an infinite（）

A．source

B．bandwidth

C．energy

D．cost