2016年1月1日，我国全面实施普通二孩政策，积极开展应对人口增长率低、人口老龄化等问题．下图是我国各省市“人口零增长”时间表．读图回答下题．

某农村中学的化学兴趣小组在开展实验活动时，用山泉水配制氢氧化钠溶液，结果几次配制所得溶液都出现浑浊的现象，放置一段时间后，容器底部还出现白色沉淀．该兴趣小组的同学针对此奇异的现象展开如下探究：

提出问题：用山泉水配制的氢氧化钠溶液为什么会出现浑浊？白色沉淀是什么物质？

作出猜想：Ⅰ．氢氧化钠样品不纯，含不溶性杂质；

Ⅱ．氢氧化钠与溶液在山泉水中的某种物质发生反应生成难溶于水的物质．

马克思说：“希腊的内部极盛时期是伯里克利时代，外部极盛时期是亚历山大时代。”“希腊内部极盛”的主要原因是（   ）

By comparing with others, you will find your problems are not so terrible.（划线部分提问）
____  you find your problems are not so terrible?
It is interesting to send English messages to friends on a mobile phone.（改为感叹句）
____  interesting thing it is to send English messages to friends on a mobile phone!
It would be nice if we could get a room with a kitchen so we could cook our town meals.（改为同义句）
It would be nice if we could get a room____  a kitchen so we could cook our own meals.
Being a volunteer is great.（改为反义疑问句）
Being a volunteer is great,____ ?
The woman teacher asked the students “ Can you understand what I am saying?”（改为间接引语）
The woman teacher asked the students____  could understand what she was saying.