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问题 选择题

鉴别O2、CO、CO2三种气体，可行简便的方法是    [ ]

A．将气体分别通入澄清石灰水        

B．将气体分别通入石蕊试液

C．试验三种气体在水中溶解性        

D．用燃着的木条分别伸入瓶内

答案

D

单项选择题

Questions 14-23


·Look at the ten statements for this part.
·You will hear a short interview with George Jones, executive director for Bread for the City a private nonprofit organization.
·Decide whetheryou think each statement is right(R), wrong(W) or not mentioned(NM).
·Mark your answers on the Answer Sheet.

The volunteers believe that their work makes a difference.

A．Right

B．Wrong

C．Not Mentioned
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单项选择题

对违反《物业管理条例》规定者，执行各种行政处罚和行政处分的单位是（）

A．房地产行政主管部门

B．物业管理企业

C．业主委员会

D．业主大会
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