某同学做“证明鸡蛋壳的主要成分是碳酸盐，并收集纯净干燥的气体”的实验．设计了如图方案进行实验：（制得的CO₂中常含有HCl和水蒸气）

若分式$\frac{2}{x-3}$有意义，则$x$应满足的条件是（   ）

完形填空

     Mr Green works in an office in France.  1  Saturday,  he went to the office to do some work. When he got on the elevator(电梯) , it stopped between the   2  . Mr Oreen could not get out of the elevator. He started to  3  but no one  4   him. Then Mr Green remembered that it was a holiday in France. No one 5 going to come to work until Tuesday.

     There was   6  for him to do. He had to wait. With nothing to eat   7drink,  Mr Green slept for most of the time. Early Tuesday morning,  his  8  came to work and found the elevator was not working. When the elevator was  9  , Mr Green came out. He was cold,  weak and tired. He had been in the elevator for about sixty-four  10  ! Now Mr Green says, "I will only use elevators if they have a telephone in them. "

“这一历史人物的存在，他的内外政策，他的军事活动，他的经济思想、法学观点和宗教政策对l9世纪的欧洲和欧洲的国际关系发生过深远的影响。”结合下图可判断出“这一历史人物”是(      )