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【单选题】
以下叙述正确的是( )。A.
如果算术表达式中含有字符型和整型数据，则把整型数据转换为字符型数据；
B.
如果算术表达式中含有字符型和实型数据，则把实型数据转换为字符型数据；
C.
如果算术表达式中含有整型和实型数据，则把实型数据转换为整型数据
D.
如果算术表达式中含有整型和实型数据，则把整型数据转换为实型数据
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举一反三
【单选题】Why should you wear a self-contained breathing apparatus before entering the engine room after the fixed CO2 system has been discharged to combat a major fine?
A.
Because carbon dioxide dilutes the oxygen concentration in the atmosphere and may cause as phyxiation.
B.
Because carbon dioxide breaks down in fire into carton monoxide which may cause blood poisoning in the person breathing this gas.
C.
Because carbon dioxide is a colorless and odorless gas that becomes highly toxic in the presence of high temperatures and will quickly incapacitate a person exposed to this gas.
D.
This action is unnecessary as carbon dioxide is neither poisonous nor toxic but is a relatively harmless gas.
【判断题】金融危机是指金融制度和货币体系的极度混乱和剧烈动荡,表现为股市狂泻、货币贬值、利率极高、工厂倒闭、银行破产、工人失业、市场一片混乱,是诱发经济危机和政治危机的根源。()
A.
正确
B.
错误
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