词汇:
the answer 生命的答案
there is no answer 没有应答
a letter 一封家书; 一封信
by letter 以书信方式; 以书信形式
no answer is also answer 不回答也是一种回答
letter and letter 字母和信
a back answer 顶嘴
a civil answer 有礼貌的回答
a correct answer 正确的答案
a direct answer 直截了当的回答
a disappointing answer 一个令人失望的答案
information security信息安全
shortage of power缺电
shopping by media媒体购物
job-hopping跳槽