以下是医学类职称英语B级考试模拟试题：

1. Which of the following is NOT a characteristic of a healthy diet?

A. High in saturated fat
B. Rich in fruits and vegetables
C. Low in processed foods
D. Adequate in protein

2. What is the most common type of cancer in women?

A. Breast cancer
B. Lung cancer
C. Skin cancer
D. Ovarian cancer

3. Which of the following is NOT a symptom of a heart attack?

A. Chest pain or discomfort
B. Shortness of breath
C. Nausea or vomiting
D. Dizziness or lightheadedness

4. What is the primary function of the respiratory system?

A. To circulate blood throughout the body
B. To filter waste products from the body
C. To exchange gases between the body and the environment
D. To produce and distribute hormones

5. What is the recommended amount of physical activity for adults?

A. 30 minutes a day, 3 days a week
B. 60 minutes a day, 5 days a week
C. 90 minutes a day, 7 days a week
D. 120 minutes a day, 7 days a week

Answers: 1. A, 2. A, 3. D, 4. C, 5. B.