问题
选择题
(山东诸城一中2009届高三年级阶段性评估,化学,15)下列各图所示装置的气密性检查中,漏气的是
答案
答案:C
C项中向外拉活塞,使锥形瓶内的压强减小,由于外界大气压的作用,长颈漏斗的导管下端的液柱应下降或锥形瓶中液体中产生气泡。故C装置气密性漏气。
(山东诸城一中2009届高三年级阶段性评估,化学,15)下列各图所示装置的气密性检查中,漏气的是
答案:C
C项中向外拉活塞,使锥形瓶内的压强减小,由于外界大气压的作用,长颈漏斗的导管下端的液柱应下降或锥形瓶中液体中产生气泡。故C装置气密性漏气。
Passage Three
Which of the following is NOT true of Hamburg according to the passage
A.The original meaning of Hamburg means bay and fortress.
B.Hamburg is the third largest city in the country.
C.The origin of Hamburg traces back to the ninth century..
D.Hamburg is where hamburger steak originated.