单项选择题

A．Courses for lawyers.
B．Courses for doctors.
C．Courses for reporters.
D．Courses for businessmen.
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单项选择题
A．Produce larger vegetables.B．Transport products more quickly.C．Grow crops in nontraditional climates.D．Keep vegetables fresher for a longer period.
A．Produce larger vegetables.
B．Transport products more quickly.
C．Grow crops in nontraditional climates.
D．Keep vegetables fresher for a longer period.
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