A：Jane，I called you just now, but you didn't pick up．____?

B：I was reading a story called the fox and the crow(《狐狸和乌鸦》)．

A：____?

B：Oh ,it's very educational．

A：____?

B：Of course．One day, the crow got a piece of meat．The fox was very hungry and wanted to eat the meat．Then the fox said hello to the crow．But the crow didn't answer．

A：____ ?

B：Then the fox said the crow had a beautiful voice and asked the crow to sing a song．The crow was very proud(得意的)and wanted to sing．When it opened its mouth，the meat dropped and the fox got it．

A：The crow was really silly．

B：____．The fox wasn't telling the truth．The crow had a terrible singing voice．

太阳能公路由三层组成：最上层为半透明的保护层，保护内部元件的同时也可以让太阳光透过；中间层为太阳能电池，用来产生电力；最底下的一层则用来隔绝土壤的湿气，避其影响到内部的线路．该设计可以将电力储存起来供给照明，同时也可以起加热的作用，避免冬天路面结冰．下列说法错误的是（ ）

蔬菜和水果长时间储存、保鲜除了湿度适中外，还应保持