单项选择题

A．More and more people are suffering from heart disease.
B．More and more doctors are focusing too much on diet and exercise.
C．People are ignorant of the prevention of heart disease and stroke.
D．Doctors are more money-pursuing than before.
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单项选择题
A．Some of its operating system may break down for some reason.B．Some of its operating system cannot support high-quality DVD playing.C．Its market share is shrinking.D．DVD playing may affect other operating system.
A．Some of its operating system may break down for some reason.
B．Some of its operating system cannot support high-quality DVD playing.
C．Its market share is shrinking.
D．DVD playing may affect other operating system.
单项选择题
A．Drug abuse can cause a lot of adverse physical reactions.B．Drug abuse can cause malnutrition.C．Drug abuse may damage the heart, liver and brain.D．Drug abuse can cause cancer.
A．Drug abuse can cause a lot of adverse physical reactions.
B．Drug abuse can cause malnutrition.
C．Drug abuse may damage the heart, liver and brain.
D．Drug abuse can cause cancer.
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