A moment's drilling by the dentist may make us nervous and upset. Many of us cannot stand pain.
To avoid the pain of a drilling that may last perhaps a minute or two, we demand the "needle"— a shot of novocaine (奴佛卡因) -that deadens the nerves around the tooth.
Now it' s true that the human body has developed its millions of nerves to be highly aware of what goes on both inside and outside of it. This helps us adjust to the world. Without our nerves—and our brain, which is a bundle of nerves— we wouldn't know what's happening. But we pay for our sensitivity. We can feel pain when the slightest thing is wrong with any part of our body. The history of torture is based on the human body being open to pain.
But there is a way to handle pain. Look at the Indian fakir(行僧) who sits on a bed of nails. Fakirs can put a needle right through an arm, and feel no pain; This ability that some humans have developed to handle pain should give us ideas about how the mind can deal with pain.
The big thing in withstanding pain is our attitude toward it. If the dentist says, "This will hurt a little, it helps us to accept the pain. By staying relaxed,' and by treating the pain as an interesting sensation, we' can handle the pain without falling apart. After all; although pain is an unpleasant sensation, it is still a sensation, and sensations are the stuff of life.
26. The passage is mainly about______.
A) how to stiffer pain
B) how to avoid pain
C) how to handle pain
D) how to stop pain
第1题:


第2题:
收发两端之间的传输距离为1000km,信号在媒体上的传播速率为200000km/s,数据长度为1000bit,数据发送速率为1Gbit/s,其发送时延为(),传播时延为()。
A.1us,5ms
B.10us,5ms
C.10us,50ms
D.100us,50ms
第3题:
若51单片机使用频率为6MHz的晶振,则振荡周期为:,机器周期为:,指令周期为:
A.1/6us,2us,不定
B.1/12us,2us,1/3us
C.1/6us,1us,不定
D.1/12us,1us,1/3us
第4题:

第5题:
【填空题】单位换算:(答案直接写整数,不要用科学计数法) 1us = ___________ ns 1ms = ___________ us 1s = ___________ ms 1s = ___________ us
第6题:
SysTick系统定时器延时1s的写法可以是()
A.Delay_us(1000000);
B.Delay_us(500000); Delay_us(500000);
C.Delay_us(400000); Delay_us(500000); Delay_us(100000);
D.Delay_us(1000000); Delay_us(1000000);