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The most {{U}}crucial{{/U}} problem any economic system faces is how to use its scarce resources.

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A.3) most probably means " ______ ". rigid in thinking interested in world financial affairs like people from the provinces limited in outlook  
PR高,相关性低  PR低,相关性高  PR低,相关性低  PR高,相关性高  
pR 22 > pR 12 > pR 134a  pR 134a > pR 22 > pR 12  pR 22 > pR 134a > pR 12  pR 134a > pR 22 > pR 12  
rigid in thinking  interested in world financial affairs  like people from the provinces  limited in outlook  
pa=pr+pn  pr=pa+pn  pr=pa;  pa=pr—pn  
CR  CR+PR  PR  CR+PR+NC  CR+PR+NC+PD  
VSWR=(1+(Pr/P开平方)/(1-(Pr/P开平方)  VSWR=(1-(Pr/P开平方)/(1+(Pr/P开平方)  VSWR=((Pr/P开平方+1)/(1+(Pr/P开平方)  VSWR=(1+(Pr/P开平方)/((Pr/P开平方-1)  
Pfr升高,Pr降低  Pfr降低,Pr升高  Pfr降低,Pr降低  Pfr升高,Pr升高  
PR间期与心率成正比  PR间期与年龄成正比  PR间期常<0.12s  PR间期<0.12s者占50%以上  以上都对  
Pfr/Pr高;  Pfr/Pr低;  Pfr/Pr适中;  与Pfr/Pr无关。  
promise    profit    procedure    product  
The American PR industry should develop global communication technologies.  People involved in PR should avoid suing the word "foreign".  American PR companies should be more internationally minded.  People working in PR should be more fluent in foreign languages.  
enjoy reading a great variety of English business publications  speak at least one foreign language fluently  are ignorant about world geography  are not as sophisticated as their European counterparts  
The American PR industry should develop global communication technologies.  People involved in PR should avoid suing the word “foreign”.  American PR companies should be more internationally minded.  People working in PR should be more fluent in foreign languages.  
British companies place more importance on PR than U.S. companies  British companies are heavily involved in planning activities  British companies are more ambitious than U. S.  Four of the world’s top public relations agencies are British-owned  

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