单项选择题

A．Astronauts’ clothing.
B．Products made in space.
C．Costume jewelry.
D．Problems in manufacturing.
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单项选择题
A．To a doctor,B．To a nurse.C．To a dentist.D．To a neurosurgeon (神经外科医生).
A．To a doctor,
B．To a nurse.
C．To a dentist.
D．To a neurosurgeon (神经外科医生).
单项选择题
What's the main reason for big cities to build their own recycling plants
A．To deal with wastes in a better way.
B．To protect the environment from pollution.
C．To get raw materials locally.
D．To get big profits from those plants.
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