题目内容

When should you avoid practicing Taiji Quan?

A. Immediately after a meal.
B. When you have any type of infection.
C. When you’re tired.
D. An hour after a meal.

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更多问题

Besides preventing diseases, long-term practice of Taiji Quan can also help us treat and cure ailments and diseases.

A. 对
B. 错

Taiji Quan is beneficial to humans in many ways, so it is not important to take some precautions for a safe practice.

A. 对
B. 错

The group activities of Taiji Quan make it harder for practitioners to enhance mutual understanding

A. 对
B. 错

4-2-空气质量指数在多少范围内为优？

A. 0-50
B. 0-55
C. 0-60
D. 0-100