It is indicated in the first two paragraphs that US mail delivery______.
A．has been charged at a low price
B．has been processed rather tardily
C．has often failed to be delivered successfully
D．has been handled by too many local facilities

未分类题'Good reason'(Line 8, Para 4)might possibly refers to the widening social gaps in______.A．living standards and lifestyle. habitsB．lifestyle. habits and social attitudesC．education levels and social attitudesD．living standards and education levels

未分类题The controversy surrounding DSM-5 focuses on______.A．the fact that its panel members refuse to file financial disclosuresB．the fact that there exists economic disputes among its panel membersC．the possibility that the panel favors drug companiesD．the possibility that the panel's decisions produce improper influences on drug industry

未分类题The text tries to convey the idea that hatred of bankers is______.A．a most dangerous prejudiceB．a natural response to recessionC．an unignorable warning to financiersD．a historically justified phenomenon

未分类题As for reengaging economics with economy, the author suggests that economists should primarily______.A．conduct research on the spirit of entrepreneurshipB．make a close examination of the market elasticityC．offer insightful guidance in business managementD．study how a society organizes its economy

未分类题The first two paragraphs mainly show that printed books______.A．can be published in a large amountB．are identical in each copy of one versionC．go through careful editing before publicationD．are carriers of imperishable texts