题目

In the future, more and more high-speed railways ________ in China.A.are built B.will build C.were built D.will be built 答案：【答案】D【解析】句意：未来，中国将修建越来越多的高铁。考查时态与语态，A. are built一般现在时的被动语态；B. will build 一般将来时；C. were built一般过去时的被动语态；D. will be built一般将来时的被动语态。根据“In the future”可知用将来时，排除AC。这里的主语“high-speed railways”与谓语“build”直25 ℃ 时，下列各溶液中关系的叙述中，正确的是 [     ]A．pH＝3的醋酸溶液与pH＝11的NaOH溶液等体积混合，则c(Na+) + c(H+)＝c(OH-) + c(CH3COO-)B．pH＝2的盐酸与pH＝l的硫酸溶液中c(H+)之比为2∶1 C．0．1mol/L HA（某酸）溶液pH≠1，0．1mol/L BOH（某碱）溶液中c(OH-) =0．1 mol/L，则BA（盐）溶液pH＜7D．4种pH相同的溶液①CH3COONa ②C6H5ONa ③NaHCO3 ④NaOH中c(Na+)的大小顺序是①＞②＞③＞④