判断题 听见的滞留现象，被称为“回声贮存”。()

未知题型 Scientists present at the 'Rethinking Gravity' conferenceA．unanimously believe that Einstein's general theory of relativity is wrong.B．have found further problems about the general theory of relativity.C．question the assumptions of the general theory of relativity.D．are trying to find out the possible flaws of the gravity theory.

未知题型 The present New York mayor would be most likely to agree thatA．the treatment of Gowanus Canal shouldn't hamper future development.B．the city should shoulder more responsibilities rather than the federatioaC．it's unnecessary to resort to the federation for financial support.D．it's more proper to plead with polluters to help pay.