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【判断题】
中国是世界上喀斯特地貌分布最广泛、发育最充分、类型最齐全的国家，以广西云贵高原最为集中。代表性景观有广西桂林山水，云南石林，四川九寨沟、湖南张家界A.
正确
B.
错误
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【简答题】小题1:Many athletes won gold medals in the Olympics, they are our national h__________. 小题2:Tom didn’t finish _____________( write) his test because he ran out of the time. 小题3:The girl is a mode...
【单选题】It is known to us that it was such great efforts _______ all the Chinese athletes had made _______ helped them get 51 gold medals in the 2008 Beijing Olympic Games. [ ]
A.
as, that
B.
that, which
C.
that, as
D.
which, which
【单选题】What accounts for black athletes' failure to obtain a college degree, according to the man?
A.
Coaches lack the incentive to graduate them.
B.
College degrees do not count much to them.
C.
They have little interest in academic work.
D.
Schools do not deem it a serious problem.
【单选题】Although there were only five athletes ____ in the race, it was a rather exciting one.
A.
competing
B.
having been competed
C.
to compete
D.
to be competed
【多选题】P、V操作是操作系统提供的具有特定功能的原语。利用P、V操作可以( )。
A.
保证系统不发生死锁
B.
实现资源的互斥使用
C.
推迟进程使用共享资源的时间
D.
提高资源利用率
E.
协调进程的执行速度
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