单项选择题

Britain was able to establish itself as a world leader in shipbuilding in the middle of

A．the 16th century.
B．the 17th century.
C．the 18th century.
D．the 19th century.
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单项选择题
The Victorian Age, eminently represented by Dickens and Thackeray, was mostly regarded as an age of ______ in English literature.
A．epic prose
B．drama
C．poetry
D．novels
单项选择题
Since chimpanzees are genetically very similar to humans,
A．chimpanzees are likely to suffer AIDS just like humans if they are infected.
B．it does not matter if human beings are infected with SIV rather than HIV-1.
C．we can use human vaccines to prevent chimpanzees from getting AIDS virus.
D．AIDS vaccines based on chimp's immune mechanism are possible to be made.
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