问题
单项选择题 A1/A2型题
下列哪一项可作为呼吸衰竭的诊断标准（）。
A.PaO2＜30mmHg，PaCO2＞50mmHg
B.PaO2＜40mmHg，PaCO2＞50mmHg
C.PaO2＜50mmHg，PaCO2＞50mmHg
D.PaO2＜60mmHg，PaCO2＞50mmHg
E.PaO2＜70mmHg，PaCO2＞50mmHg
答案
参考答案：D
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下列哪一项可作为呼吸衰竭的诊断标准（）。
A.PaO2＜30mmHg，PaCO2＞50mmHg
B.PaO2＜40mmHg，PaCO2＞50mmHg
C.PaO2＜50mmHg，PaCO2＞50mmHg
D.PaO2＜60mmHg，PaCO2＞50mmHg
E.PaO2＜70mmHg，PaCO2＞50mmHg
参考答案：D
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Tom was also a 2 boy. One day, a rich man 3 Miser appeared （出现) in front of Tom. He watched his 4 shoes for a while, and then, looked at Tom. Tom knew this kind of people well. They love money but hate to spend it. Tom said, "Let me 5 your shoes, sir. Only two pence (便士), sir. " Mr Miser shook (摇) his head and walked away. Tom thought for a moment andthen called out, "I'd like to clean it for nothing. " This time Mr Miser agreed. And soon one of his shoes was shining brightly. When the rich man put his other shoe on the stool (凳子), Tom said he wouldn'tclean it for him 6 he was paid two pence for his work. Mr Miser was very 7 . He refused to pay anything and went away. But to his 8 , the well-cleaned shoe was so bright that it made the other onelook even dirtier. Mr Miser looked around. People in the street were 9 at him. Finally the rich man 10 and gave Tom two pence. In a very short time his two shoes shone brightly. |