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
During the 19th century, Jews in most European countries achieved some equality of status with non-Jews. Nonetheless, at times Jews were harassed by anti-Semitic groups.
A．opposed
B．exploited
C．despised
D．annoyed
单项选择题
Not until the advent of histochemistry could the anatomist see through the micro- scope which cells carry specific enzymes or gauge how active these enzymes are in different cells under various conditions.
A．discern
B．grasp
C．measure
D．estimate
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