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请根据短文内容,回答题。 Music Music is one of the most beautiful forms of artistic expressions ever invented. In movies and plays, music has an added function: it not only moves people but also can shock people. Our eardrums can withstand sound within 20 to 80 decibels (分贝 ) . Once sound exceeds this limit, even beautiful music will become car-splitting noise and harm health. A strong blast ( 响声 ) of high sound can twist and break a solid iron sheet. High sound of 150 decibels can kill a healthy rat. In movies, sometimes the hero can produce a sound that ordinary people can&39;t hear and only those who have the same ability can feel. In nature, there is actually sound that is beyond our hearing. In physics, the sound that exceeds 20,000 hz is called ultrasonic (超音波的). Dolphins, whales and bats can make such high-frequency sound. It does no harm to health. Sound less than 20 hz is called infrasonic ( 次声 ) waves. When we move, the air will vibrate. The vibration of air can produce infrasonic waves. As the frequency of infrasonic waves is close to that of people&39;s internal organs, infrasonic wave may cause resonance (共振) in human bodies. As a result, people&39;s vision may weaken and internal organs may rupture (断裂). However, whether an infrasonic wave can be used as a weapon depends on its intensity. If its intensity is very low, it won&39;t damage internal organs or a person&39;s health. If the intensity of infrasonic wave exceeds 160 decibels, it is extremely harmful. When wind blows at a force of 3 or 4 over the sea, it will produce infrasonic waves of several decibels. Only typhoons can produce infrasonic waves of over 100 decibels. At present, scientists can only produce infrasonic weapons in the lab with the help of advanced scientific tools and powerful electric power. What could be the best title of the passage? 查看材料
A.
The power of music
B.
The harms of noises
C.
The magic of sound
D.
The discovery of infrasonic waves
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举一反三
【单选题】我国旅业的核心价值观是
A.
游客至上,服务为本
B.
游客为本,服务至诚
C.
游客为本,服务至上
D.
游客至上,服务为先
【多选题】仓库温湿度调节的具体方法有:
A.
通风
B.
密封
C.
吸湿
D.
排水
【单选题】男,40岁。腹股沟斜疝5年,搬举重物时斜疝被嵌顿,行手术复位后,观察重点是下列哪一项
A.
生命体征
B.
神志变化
C.
肛门排气
D.
呕吐腹胀
E.
腹痛、腹部体征
【单选题】礼仪的含义正确的是
A.
B.
C.
D.
【多选题】仓库温湿度调节的方法常有()
A.
机械去湿
B.
通风
C.
密封
D.
吸潮
E.
烤干
【多选题】仓库温湿度调节的方法包括( )。
A.
通风
B.
吸潮
C.
空调器调节
D.
密封
【多选题】仓库温湿度调节的方法有( )
A.
密封
B.
通风
C.
吸潮
D.
加热
E.
升温
F.
降温
G.
加湿
【多选题】个人礼仪蕴含的道德意义,描述正确的是( )
A.
是社会成员之间相互尊重、彼此友好的表示
B.
是一个人的公共道德修养在社会互动中的体现
C.
有助于塑造良好的个人形象,增进人际交往
D.
有助于促进社会和谐,促进整个国家和全民族整体文明程度的提高,加快社会的发展
【单选题】对职业培训的含义正确的描述是
A.
职业培训的产生是为适应经济和社会发展的需要
B.
职业培训对象是要求获得就业培训补助者
C.
职业培训必须通过学校教育才能完成
D.
职业培训的目的是以提高做人的礼仪素质
【单选题】关于古代“礼”的含义不正确的说法是__________。
A.
政治制度
B.
礼貌、礼节
C.
礼物
D.
仪式
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