①形成酸雨的主要物质是____．

②可用于人工降雨和舞台制造“云雾”效果的物质是____；

③具有吸附性，净水器中常使用的物质是____．

④香烟燃烧产生的能与血液中血红蛋白结合的有毒气体是____

⑤能使澄清石灰水变浑浊的是____．

我国古代的最高学府太学设在（　　）

   Many people like pandas very much. They are very 1   . Most of them live in Sichuan,    2  .  They    3 white hair,  but their shoulders,  legs,  ears and eyes are    4  . Pandas are usually heavy,  but they can climb trees like  5   animals.
   Pandas’ favorite food is bamboo    6  . But long long ago(很久很久以前),  pandas liked to eat meat. It takes pandas a lot of time to have food every day. When pandas are full(吃饱的),  they like    7 . They relax many hours every day.
   However, there are   8   pandas in the world today.    9   some people cut down (砍伐) too many bamboo trees and pandas can not find enough(足够的) food.
   I think we must    10   them

“美国的特命全权公使委派到世界的那一边（中国），站在树底下，手里拿着筐子，等着接他在树上的伙伴摇撼下来的果子。甚至他还接到训令，万一树上的人和果园的主人发生纠纷，他应当出来调停。”当时还有一个国家和美国想法类似，你知道他是（　　）