单项选择题

A．Biological companies.
B．Nobody.
C．Scientists.
D．Government.
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单项选择题
A．He is very polite and considerate.B．He is very rude and inconsiderate.C．He is very cynical and laughable.D．He is careless and inconsiderate.
A．He is very polite and considerate.
B．He is very rude and inconsiderate.
C．He is very cynical and laughable.
D．He is careless and inconsiderate.
单项选择题
A．An Italian navigator.B．A young geographer and map-maker,C．A sailor.D．A politician.
A．An Italian navigator.
B．A young geographer and map-maker,
C．A sailor.
D．A politician.
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