单项选择题

All the following problems are implied as possible causes of campus suicide incidents EXCEPT ______.

A．poor academic results
B．failing to get proper sleep
C．lack of family concern
D．family history of mental illness
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单项选择题
It can be inferred that proper amounts of iodine, fluoride and calcium can ______.
A．benefit people's physical health
B．influence the quality of water supply
C．help provide breeding places for pests
D．strengthen a person's character
单项选择题
How does Syracuse University defend itself against Anita's suit
A．It has given her due attention as well as help.
B．Adult students should be able to control their own behavior.
C．It is more than the school's responsibility to supervise the students.
D．Colleges can be a breeding ground for psychiatric problems.
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