A recent study found only a fifth of stay-at-home students were ( ) in extracurricular activities.
A. entered
B. involved
C. joined
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He argued that everyone in the academic ( ) should use the Internet for research.
A. circle
B. measure
C. matter
通过哪项可以获得放松的身体状态:
A. 有潜伴在场
B. 最大程度的锻炼
C. 过度换气
D. 恰当的调息
放松阶段采用的呼吸方法
A. 腹式呼吸
B. 胸式呼吸
C. 全呼吸
D. 大口吸吐
放松阶段的目的是:
A. 身体和精神上完全的放松
B. 吸入更多的氧气
C. 排出更多的二氧化碳
D. 让精神更加高度集中