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(2) _____ is new role for cardiovascular system according to investigators.

A. Supply the brain with plenty of oxygen-rich blood
B. Deferring senile dementia
C. Eliminating memory problems
D. Understanding the situation of nerve cells

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(3) The following are causes of dementia in older adults EXCEPT _____.

Alzheimer’s disease
B. stroke
C. prescription medications
D. microinfarct

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(4) Observational studies refer that _____.

A. the older people get, the higher risk to get high blood pressure
B. the older people get, the less relation happens between hypertension and dementia
C. the older people get, the more relation happens between hypertension and dementia
D. the older people get, the higher risk to get cardiovascular diseases

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The author believes that _____.

A. quitting smoking and exercising regularly are beneficial to the heart
B. quitting smoking and exercising regularly are helpful to delaying dementia
C. quitting smoking and exercising regularly are helpful to the brain
D. quitting smoking and exercising regularly are beneficial to the heart and the brain

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Text B1. Understanding main bodies and points1) Paragraphs 3—6 are the main bodies of the passage. Please choose the correct heading for them from the list of headings below. Write the correct number a--h in spaces 1--4.List of Headingsa. Conclusion made from observational studiesb. Causes of dementiac. Benefits of exercise for the braind. Quitting smoking and doing exercisese. Causes and treatments of dementiaf. Relation between cardiovascular treatment and dementiag. Age and dementiah. Results of a randomized controlled trial of exercise(1) Para.3 _______________(2) Para.4 _(3) Para.5 _(4) Para.6 _______________

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(2) _____ is new role for cardiovascular system according to investigators.

A. Supply the brain with plenty of oxygen-rich blood B. Deferring senile dementia C. Eliminating memory problems D. Understanding the situation of nerve cells

(3) The following are causes of dementia in older adults EXCEPT _____.

(4) Observational studies refer that _____.

The author believes that _____.

A. Supply the brain with plenty of oxygen-rich blood
B. Deferring senile dementia
C. Eliminating memory problems
D. Understanding the situation of nerve cells