如图甲、乙所示是螺旋测微器和游标卡尺测量工件长度时的情形．螺旋测微器读数为____ mm．游标卡尺读数为____ mm．

  “Cool" is a word with many meanings．Its old meaning is used to express a temperature that is a little bit cold．As the world has changed，the word has had many different meanings．
  “Cool"can be used to express feelings of interest in almost everything When you see a famous car in the street，maybe you will say，“It's cool." You may think，“He's so cool," when you see your favorite footballer．
    We all maximize（扩大） the meaning of “cool". You can use it instead of many words such as “new" or "surprising"．Here's an interesting story we can use to show the way the word is used．A teacher asked her students to write about the waterfall（瀑布）they had visited．On one student's paper was just the one sentence, “It's so cool．Maybe he thought it was the best way to show what he saw and felt. But the story also shows a lack of words．Without “cool”，some people have no words to show the same meaning．So it is quite important to keep some credibility（可信性）．Can you think of many other words that make your life as colorful as the word "cool"？ I can．And I think they are also very cool．

材料一  英国学者威尔斯说： 当西方人的心灵为神学所缠迷而处于蒙昧黑暗之中，中国人的思想却是开放的、兼收并蓄而好探求的。”唐都长安，是当时世界上人口最多，最为繁华、最为富庶和文明的城市，其博大的气概，壮美的景观，发达的经济和光辉灿烂的文化艺术，使当时欧洲人心目中像天堂一样富丽堂皇和繁荣的巴格达、拜占庭都难以望其项背，更不用说当时的巴黎、伦敦、威尼斯、佛罗伦萨了。当时的长安也是世界各国人民向往的地方，大量的日本人、新罗人、骠国（缅甸）人、真腊（柬埔寨）人、天竺人、狮子国人、波斯人、大食人等长期居住在中国，经商、生活，甚至参加科举，在唐政府任官。

——摘自中学历史教师用书

材料二  中国一直是对外贸易的出超国，有发展贸易的有利条件。但清政府害怕国内人民和外国人勾结“滋事”，实行闭关政策，千方百计限制商人出海贸易。如康熙时上海大商人张元隆想打造 100 艘远洋帆船，与外国商船竞争，即被诬为结交海盗。早就活动在东南亚各地的中国商人和华侨，清政府也不给予支持，雍正帝曾说“此辈多系不安本分之人，若听其去来任意，伊等益无顾忌，轻去其乡而漂流外国者益众矣。”

中国商人和华侨出国贸易受到阻挠和打击，对外贸易的主动权和高额利润便长期被外商所垄断。此外，清朝的闭关政策还严重阻碍了生产的发展和技术的进步。