It is Earth Hour now. Many people turn off their____. Alice is not ____TV with her parents. She is ____ at the stars withthem. Kitty and her brother are not ____ storybooks. Their grandmais telling them a story. Sally usually does her homework at night. Now she is playing word games ____ her family.

“辨而不华，质而不俚，其文直，其事核，不虚美，不隐恶。”

                                                 ——班固

如图是自然界中氮循环的一部分，下列有关叙述不正确的是（　　）

辨别下列史实的正误。

“剪发兴，辫子灭；爱国帽兴，瓜皮帽灭；天足兴，纤足灭；阳历兴，阴历灭；鞠躬礼兴，跪拜礼灭…”这首民谣反映了某个重大历史事件引起的社会风貌的变化．这一事件是（    ）