单项选择题

The factors that arc in relation to exercises injuries

A．have been obtained from many good studies
B．have been confirmed by many data
C．cannot confirm the risk of equipment types
D．can be proved easily by the data through calculation

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单项选择题

The passage is mainly about ______.

A．the high injury rates for those doing exercises
B．the ways to avoid exercise injuries
C．the evidences for the seriousness of exercise injuries
D．the studies about injury rates and causes for injuries

单项选择题

Which of the following is NOT shown as the factor for causing exercise injuries

A．The amount of exercise.
B．The age, sex and body type.
C．Structural abnormalities.
D．The sudden increases in training intensity.