题目

—He wrote a lot of novels, none of ______________ were popular. —It’s the same with his wife. She wrote some plays, but none of ______________ was a success. A．these；them                                               B．which；which C．those；which                                             D．which；them8．如图所示，在海边海滩，我们经常发现，沙子滚烫，而海水依旧凉爽，这主要是因为海水的比热容比沙子大，在同样受热或冷却时，海水温度变化小（选填“大”或“小”）的缘故．