想了解附近小河的鱼比以前少了，我们可以采用（   ）调查方式。

某一时期，一座位于江南的城市，在熙来骧往的街道上，随处可见贩卖各色棉布、丝绸、青花瓷、胡椒、烟草等货品的街铺。人们买卖时，大额交易使用银两，小额交易使用铜钱。上述情景最有可能出现于何时（    ）

任务型阅读

   ①The meaning of shaking the head is not always the same in different countries. Maybe some visitors would be surprised when they first came to India. When talking to an Indian, he would often shake his head. The visitors might think that the Indian did not like what they said. But, in fact, they would be completely(完全地)wrong.

   Indians always shake their heads when they talk to each other. It does not have the same meaning as“No”. If someone wants  ②  (visit)India, he should know this, or it will give him some trouble.

   One day, a foreign officer went to  ③  on business. He leased(租用)a car and hired(雇用)an Indian to drive it. When he told his driver to send him to his office, the Indian shook his head at once. The officer said again, and the driver shook his head again. At last, the officer, of course, got angry.

   “Why do you refuse(拒绝)my order(要求)? ”he shouted. “Drive me to my office at once! ”

   The driver answered in a quite loud voice, too. “Yes, sir! ”But to the officer’s surprise, the driver shook his head at the same time.

The car started, and the foreign officer was now too surprised to say a word. He thought about it for a while, and then ④he nodded with a smile, “‘No’ means ‘Yes’ here! ”

室温下，石灰乳悬浊液存在下列平衡向Ca（OH）₂（s）Ca²⁺（aq）+2OH^﹣（aq），此悬浊液中加入少量生石灰恢复至室温，下列说法中正确的是（　　）

绿色发展：让自然美景永驻人间

材料一：2016年3月10日，中共中央******在参加十二届全国人大四次会议青海代表团审议时强调，一定要生态保护优先，要像保护眼睛一样保护生态环境，像对待生命一样对待生态环境。发展必须是遵循经济规律的科学发展，必须是遵循自然规律的可持续发展，必须是遵循社会规律的包容性发展。尊重自然、顺应自然、保护自然，才是可持续发展的必然选择。所以，必须实施“碧水蓝天”工程，坚持在发展中保护、在保护中发展。

材料二：改革开放以来，中国经济在全球经济版图中一枝独秀，呈现出前所未有的快速繁荣景象，一次又一次在世界面前刷新着高增速的“中国奇迹”，也让人民群众普遍富裕起来，但随之而来的则是：马路宽了，高楼多了，钱包鼓了，可是清澈的河水、洁净的空气却成了奢侈品。粗放的发展方式，让我们在资源环境方面付出沉重代价，在得到“金山银山”的同时，我们的“绿水青山”正逐渐消逝在我们的视野中。