题目内容
（请给出正确答案）
[主观题]
Laughing has positive effects on people's health because ______.A．it can produce more horm
Laughing has positive effects on people's health because ______.
A．it can produce more hormones.
B．it can accelerate their pulse.
C．it can raise their blood pressure.
D．it can help them relax.
如搜索结果不匹配，请 联系老师 获取答案
