北师大版（2019）选择性必修 第二册Unit 4 Humour Lesson 2 Why Do We Need Humour重点词汇短语课件.pptx

　Lesson 2　 Why Do We Need Humour？;单词检验 1．muscle n. ___________ 2．blood vessel ________ 3．mood n. ____________ 4．far--reaching adj. __________ 5．immune adj. ___________ 6．cell n. __________;单词检验 7．incorporate vt. ________________ 8．blush vi. _________ 9．embarrassment n. ____________ 10．tension n. ________________ _________ adj. (人)神经紧张的；(形势等)令人紧张的；(肌肉或身体部位)绷紧的 ;11．physical adj. ________________ ____________ adv. 身体上；肉体上 12．_____________ adj. 心理的，精神的 psychology n. ________________ 13．energise vt. ________________________ ①________ n. 精力 ②________ adj. 精力充沛的 14．infection n. ________________ ①____________ v. 使感染；传染 ②____________ adj. 感染的；传染性的 ;15．whisper vi. vt. ________________ n. ____________ ______________ 低声说 16．accidentally adv. ________________ ①accidental adj. ________________ ②______________ n. 事故 17．expense n. ________________ ______________ adj. 昂贵的 at sb.s expense ________________;Good morning and thank you for joining me today. The title of my speech today isWhy do we need humour? I believe that all of us enjoy watching a comedy film or hearing a good joke, because it makes us laugh all the time. Babies laugh long before they can speak. Its almost as if humour is hard-wired into us. So there must be some kind of benefit to it. What can humour do for us? According to recent research, humour has both physical and psychological effects.;Lets talk about the physical effects. Firstly, laughter helps relieve tension. It relaxes the muscles in our body, and the effects can be felt for as long as 45 minutes after a good laugh. Also, a good laugh increases blood flow to the heart and improves the function of blood vessels, which helps protect us from heart disease. Finally, when we laugh, the level of stress chemicals in our body falls, and the number of immune cells in our body increases. Both mean that our body is better able to fight infection.;There is a song that says, Smile, though your heart is breaking. Does