单项选择题

You'll find it hard to move the way you want to（）

A.what affects muscles all through your body
B.if there isn't enough dopamine in your body
C.which cannot be cured yet
D.which may be the first symptom you notice
E.if you have a fixed or blank expression
F.what causes Parkinson's disease

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单项选择题

All the following statements are true EXCEPT（）

A．a relatively small number of the volunteers had large or fast-growing nodules.
B．almost all those with large or fast-growing nodules were found to have lung cancer.
C．all the volunteers were at high risk for lung cancer.
D．most of the volunteers tested negative during screening.

单项选择题

The findings of the study apply to conditions all over the world.（）

A． Right
B． Wrong
C． Not mentioned