村务公开在《村民自治章程》中是十分重要的一条，这是因为村务公开
①有利于增加村务决策的透明度　　 ②有利于加强国家机关的反腐倡廉工作
③有利于发扬民主，进行村务监督   ④是村民参与民主管理的主要途径

阅读下列材料回答问题

材料一： 新中国诞生后，美国从政治、军事、经济等各方面采取措施，千方百计地想把新中国扼杀在摇篮里。政治上，实行所谓遏制加孤立政策……经济上，对新中国进行经济封锁和贸易禁运。军事上，美国对新中国实行武装侵略和军事包围……派第七舰队侵入台湾海峡，阻挠中国人民解放军解放台湾。——纪胜利、郝庆云《战后国际关系史（1945-2000）》

材料二： 美国总统尼克松在机场受到周恩来总理等人的欢迎（见下图）

材料三： 我们要坚持中美关系的正确方向……共同努力建设21世纪积极合作全面的中美关系这一目标……促进两国在双边、地区、全球层面的沟通、协调、合作。——***在第二轮中美战略与经济对话开幕式上的致辞（2010年5月24日）

某同学发现，上个月考试用过的氢氧化钠溶液的试剂瓶没有塞上瓶塞，对该溶液是否变质，同学们一起进行如下探究实验．

【猜想与假设】猜想①该溶液没有变质；猜想②该溶液全部变质；猜想③该溶液部分变质．

【查阅资料】BaCl₂溶液呈中性，且BaCl₂+Na₂CO₃═BaCO₃↓+2NaCl

【方案讨论】为了验证猜想②或猜想③，甲乙丙三同学分别提出如下方案：

甲：向溶液中滴加酚酞，若酚酞变红，则猜想③成立，否则猜想②成立．同学们认为此方案不行，原因是____．

乙：先向溶液中滴加足量的Ba（OH）₂，再滴入酚酞，根据现象不同来判断猜想②或猜想③成立．同学们认为此方案不行，原因是____．

丙：先向溶液中滴加足量的BaCl₂溶液，再滴入酚酞．根据现象不同来判断猜想②或猜想③成立．同学们通过分析认为此方案可行．

【实验操作】

实验步骤	实验现象	结论及解释
步骤一：取少量待测溶液于试管中，向其中滴加足量____	有气泡产生	猜想____
步骤二：取少量待测溶液于试管中，然后滴加足量的BaCl2溶液，静置，向上层清液中滴加酚酞	①____ ②____	猜想____ 成立

【反思与交流】敞口放置的氢氧化钠溶液容易变质，所以要____保存．

能够识别抗原的细胞是                      (    )
①吞噬细胞                 ②T细胞                     ③B细胞              ④记忆细胞
⑤效应B细胞             ⑥效应T细胞             ⑦抗体                 ⑧淋巴因子

阅读理解

    What did you do on April 23, World Book Day, last year? Did you find some interesting books to read? Now let me introduce some good books for you to read.

Title: Dear Andreas
Author: Long Yingtai＆Andreas

Andreas is a college student studying in Germany. His mother is a writer working in Taiwan. By writing letters to each other for more than three years, Long Yingtai says she clearly understands what an 18-year-old man is like, Andreas says he knows his mother better. This is a great book full of love. Don't miss it.
Title: Climate Change+2 Degrees
Author: Yamamoto Ryoichi

If the earth's temperature went up 2℃, what would happen? In this book we learn about the history, today's situation and the future of global warming. The author also tells us proper and useful ways to protect our world.
Title: The Methods and Madness Inside Room 56
Author: Rafe Esquith

Perhaps the most famous fifth-grade teacher in America, Rafe Esquith, helps his children understand literature, love life, and become happy, self-confident people using his successful methods in his Los Angeles public school classroom. He has created surprising miracles. This is a powerful book. You'd better read it.
Title: The Last Lecture
Author: Randy Pausch

Randy Pausch, a professor from New York was asked to give a lecture. He knew it would probably be his last lecture, because he was dying of illness. His lecture wasn't about dying, but about getting over the difficulties, helping others to realize their dreams.