单项选择题

A corps of so-called barefoot doctors are trained in hygiene, preventive medicine, acupuncture, and routine treatment of common diseases.

A．nutrition
B．sanitation
C．nursery
D．welfare
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单项选择题
The chief functions of direct-mail advertising are to familiarize prospective buyers with a product, its name, its maker, and its merits and with the product's local distributors.
A．potential
B．responsive
C．inquisitive
D．perceptive
单项选择题
Australia began to assume its modern configuration by the Eocene Epoch, some 50 million years ago, when Antarctica broke away and drifted southward.
A．status
B．sphere
C．shape
D．situation
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