单项选择题

A．An assembly line in an automobile factory is a very good example of the division of labor.
B．One worker stays in one place and waits for a conveyor belt to move the product to him.
C．One worker has the responsibility of producing an entire car each year.
D．One worker has a particular duty to install a door or add lights.
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单项选择题
A．He can not make a copy because of the copyright.B．He can make his own copy.C．He should wait until tomorrow.D．He can not make a copy now.
A．He can not make a copy because of the copyright.
B．He can make his own copy.
C．He should wait until tomorrow.
D．He can not make a copy now.
单项选择题
A．Do artificial respiration as soon as possible if the person has stopped breathing.B．Act immediately to stop the flow of blood if the person is bleeding badly.C．Loosen his clothing if the person is unconscious.D．Perform the operation as soon as possible.
A．Do artificial respiration as soon as possible if the person has stopped breathing.
B．Act immediately to stop the flow of blood if the person is bleeding badly.
C．Loosen his clothing if the person is unconscious.
D．Perform the operation as soon as possible.
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