According to the author, the incidents of e-book removal are rooted in______.
A. sellers" lack of professional ethics
B. buyers" abandonment of user right
C. buyers" conduction of improper practices
D. sellers" retaining of books" ownership
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Young people raised in tough economic crisis______.
A. tend to hold a more pessimistic attitude toward life
B. are less likely to hop from job to job
C. tend to try their luck more frequently
D. are paid less than those living in booming period
通常所说的“天涯海角”在海南岛，其中“天涯”两个大字石刻，是_____写的。
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