“科学”流言，就在你身边。比如，维生素B1泡水能驱蚊、自制水果酵素排毒减肥、淡盐水浸泡果蔬可去除农药残留、WiFi辐射会损害健康……等等。科学家用科学事实已经颠覆了网上这些看似真实的无稽之谈。这佐证了（    ）

根据句意和提示写出单词，完成句子。
（1）We should brush our____  (牙齿) after each meal.
（2）On his mother's____ (四十) birthday, he gave her a card and some flowers.
（3）Does your father like ____  (看) newspapers?
（4）You may____ (借) the book for two weeks.
（5）Now mankind is exploring those ____  (未知的)outer space in many ways.

明初，朱元璋立了一块“宦官不得干预政事”的铁牌，但事与愿违，明王朝却成为历代宦官干政最厉害的王朝。宦官干政的根源是（   ）