党的十八大对国际国内形势的总体判断是：当前，世情、国情、党情继续发生深刻变化，我们面临的()。
A. 发展机遇和风险挑战前所未有
B. 机遇前所未有，挑战也前所未有，机遇大于挑战
C. 机遇前所未有，挑战也前所未有，挑战大于机遇
D. 世界多极化和经济全球化的趋势在曲折中发展，科技进步日新月异，综合国力竞争日趋激烈
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If one wants to better understand regret, he should first know something about______.
A. three emotional flavors
B. its working mechanism
C. its typical symptoms
D. its three categories
It isnt always beneficial to look back over our lives since we may______.
A. fail to find any meaning in our lives
B. feel unsatisfied with the things we did
C. feel regretful about what we did in the past
D. become less courageous to live in the future
The author argues that the sex ratio at birth is______.
A. a natural phenomenon not subject to human activities
B. unaffected by cultural or economic factors in a country
C. related to annual variations in day length and temperature
D. associated with the relative stability of the world"s nations
The notion that depression is a female condition is______.
A. absurd
B. illogical
C. out of date
D. still prevalent
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