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【单选题】
若事务T对数据对象A加上X锁,其它任何事务都( )A.
可以加任何锁
B.
不能再对A加任何类型的锁，直到T释放A上的锁
C.
能再对A加S锁，不必等到T释放A上的锁
D.
能再对A加X锁
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举一反三
【单选题】Listen to a news report
A.
Student veterans who experience frustration with other students.
B.
Student veterans in service at the time of 9/11 or later.
C.
Veterans returning home from wars.
D.
Student veterans with problems adjusting to university life.
【单选题】Listen to a news report
A.
They did not have enough money to travel back to the UK.
B.
Their daughter was not healthy enough to travel back to the UK.
C.
They were waiting until the insurance covered the medical expenses.
D.
They were waiting until the hospital covered the medical expenses.
【单选题】Listen to a news report
A.
The benefits the Post-9/11 GI Bill offers.
B.
The difficulties student veterans meet in US universities.
C.
The increase of student veterans in US universities.
D.
The support US universities offer to student veterans.
【单选题】Listen to a news report
A.
The fear of public speaking and why.
B.
How people can overcome the fear of public speaking.
C.
How an audience reacts to people who have a fear of public speaking.
D.
The fear of public speaking ranks higher than the fear of death.
【单选题】Listen to the news report
A.
Finding a “Mr Right” for Julia in a week.
B.
Arranging dates for Julia through the dating sites.
C.
Arranging a date for Valentine’s Day for Julia.
D.
Finding out Julia’s real interests.
【单选题】Listen to a news report
A.
The cost of giving birth in the US.
B.
The cost of giving birth in the UK.
C.
A British baby who was born 12 weeks early in New York City.
D.
A British couple's medical expenses are covered by a New York hospital.
【单选题】Listen to the news report
A.
Medical costs are quite high.
B.
Health care is provided by the government.
C.
Health care is covered by insurance.
D.
Not all citizens have access to the health care.
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