National Coleman, 37, a British tourist, was arrested (逮捕) at Sri Lanka’s international airport on Monday. She is now at a centre in the airport waiting for a flight back to the UK. Airpor t of ficers told Ms Coleman that her Buddha (佛像) tattoo (纹身) on her arm was disrespectful to Sri Lankan culture. A police spokesman said she was arrested for the Buddha.
    This is not the first time that tourist was sent back to the UK last year because he spoke disrespectfully when passport offers asked him about a Buddha tattoo on his arm. Britain’s Independent newspaper reports that in 2010, R&B star Akon was told he could not visit Sri Lanka because of a video for his song. The video showed a pool party in front of a Buddha. A British government website warns who visit Sri Lanka not to pose (摆姿势) for photos in front of a Buddha.

”切实减轻学生课业负担”是我市作业改革的一项重要举措．某中学为了解本校学生平均每天的课外作业时间，随机抽取部分学生进行问卷调查，并将调查结果分为、、、四个等级，小时以内；小时--小时；小时--小时；小时以上．根据调查结果绘制了如图所示的两种不完整的统计图，请根据图中信息解答下列问题：
该校共调查了______学生；
请将条形统计图补充完整；
表示等级的扇形圆心角的度数是______；
在此次调查问卷中，甲、乙两班各有人平均每天课外作业量都是小时以上，从这人中人选人去参加座谈，用列表表或画树状图的方法求选出的人来自不同班级的概率．

图中A、B、C、D是四种粒子的结构示意图，E是碘元素在元素周期表中的信息．

回答下列问题：
（1）A、B、C、D四种粒子共表示_____元素，其中阴离子的符号为____．
（2）D中的_____
（3）E中碘元素原子的核外电子数为_______．

欲配制的溶液，操作如图所示．

请回答下列问题：
（1）图中操作有错误的是___（填序号）．
（2）配制该溶液时，需要固体___．
（3）量取溶剂时，采用仰视的方法读数，会导致溶液的溶质质量分数____　（“偏大”、“偏小”或“无影响”）．
（4）将配好的溶液稀释成溶质质量分数为的溶液，需加入___水．