What leads should be utilized to analyze P wave information?

分析P波信息时应该使用哪个导联？

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Authorities say the couple also used short wave radio to take orders from Havana and to transmit information.

VOA: standard.2009.06.06

Shirky believes that we are on the crest of an ever-surging wave of democratized information: the Gutenberg printing press produced the Reformation, which produced the Scientific Revolution, which produced the Enlightenment, which produced the Internet, each move more liberating than the one before.

NEWYORKER: The Information

This is the second wave of Freedom of Information requests submitted by Mr Turner-Mitchell.

BBC: High Street retail fund 'barely touched'

But a variant of the technique, which involves measuring changes in the speed of the reflected wave, can reveal information about moisture.

ECONOMIST: Winemaking and radar