单项选择题

What is advertised for sale

A．A type of diesel engine.
B．A type of car.
C．Tourist guidance.
D．A type of diesel.
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单项选择题
According to the passage, which is NOT TRUE of sickle-cell anemia
A．It is inherited.
B．It is not contagious.
C．It can be cured.
D．It occurs mostly in Africans.
单项选择题
These references most probably appear ______.
A．below an article on water purification
B．below an article on health and medicare
C．in a do-it-yourself book
D．in an operation manual
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