皮皮学,免费搜题
登录
logo - 刷刷题
搜题
【简答题】
Usually, students are not encouraged to run or jump around in the corridor (走廊). However,students in a British grammar school really enjoy running on the corridor tiles (瓷砖) and their teachers even encourage them to do that. Why? It is because the corridor was built with special kinetic (动能的) tiles. When students jump on the tiles, electricity will be generated ( 产生). After one year, the electricity generated from the tiles can fully charge 853 mobile phones or power(供电) an electric car to drive seven miles. It’s amazing, isn’t it? The corridor tiles are really a brilliant invention. Students can not only play on the corridor,but also help power the lights in their school corridors and other devices ( 设备) in their classrooms. Besides, this is a good way to teach students to be creative. They will be inspired to be scientists, inventors and engineers in the future to find clean energy for all humans. The inventor of the magic corridor tiles is Laurence Kemball-Cook. He was once a student in this school. Now, he is CEO of his own company. The corridor tiles are not Laurence’s only invention. He has also invented a special dance floor, which can be used at music festivals. It allows dancers to charge their mobile phones while they are dancing on the dance floor. 小题1:Why do the students in the passage enjoy running on the corridor tiles? A. Because the corridor tiles are expensive. B. Because the teachers ask them to do that. C. Because the corridor was built with special tiles. 小题2:After one year, the electricity generated from the tiles can provide enough energy for _______. A. over 800 mobile phones B. all the lights of the school C. an electric car to drive70 miles 小题3:The underlined word “inspired” most probably means “ _________”. A. encouraged B. forced C. trained 小题4:What else has Laurence invented besides the corridor tiles from the passage? A. A mobile phone. B. A music player. C. A special dance floor. 小题5:According to the passage, which of the following statements is TRUE? A. Students are not allowed to walk in the corridor. B. Laurence once studied in the British grammar school. C. Laurence has more than one company of his own.
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【单选题】音乐信号的频带范围为:
A.
50~15000Hz
B.
300~3400Hz
C.
50~15000KHz
D.
300~3400MHz
【多选题】健康按其程度不同可分为
A.
特别健康者
B.
普通健康者
C.
需注意者
D.
需保护者和病者
【简答题】人耳能听到的声音带宽为(),人的语音频率的范围为(),音乐信号的频率范围为()。
【判断题】螺旋器由柱细胞、指细胞、毛细胞构成
A.
正确
B.
错误
【简答题】全频带声音____的频谱范围在20Hz~20kHz之间,为保证音乐信号采样时不失真,其取样频率应在____以上。
【简答题】全频带声音( 如音乐声、风雨声、汽车声等 ) 的频谱范围在 20Hz ~ 20kHz 之间,为保证音乐信号采样时不失真,其取样频率应在( )以上。
【多选题】螺旋器的结构特点
A.
由毛细胞和支持细胞组成
B.
支持细胞主要有柱细胞和指细胞
C.
柱细胞基部宽,中部细长,内.外柱细胞围成三角形的内隧道
D.
内、外指细胞位于内、外柱细胞的内、外侧
E.
支持细胞的胞质富含张力丝,对稳定螺旋器的结构、固定毛细胞的位置具有很强的支持能力
【简答题】就客房部而言,针对客人投诉的四种类型,应采用何种方法恰当处理?
【判断题】全频带声音 (如音乐声、风雨声、汽车声等)的频谱范围在20Hz~20kHz之间,为保证音乐信号采样时不失真,其取样频率应在40KHz以上。
A.
正确
B.
错误
【简答题】音乐声音信号的频带范围在 20Hz 到 20kHz ,按照奈奎斯特抽样定理,抽样率最少是多少?如果每次抽样的幅度量化精度为 16 位,如果用数据通道传送,最低数据带宽是多少?那么把一分钟的音乐抽样的 PCM 编码数据存储起来,需要多少字节的存储容量?
相关题目:
参考解析:
知识点:
题目纠错 0
发布
创建自己的小题库 - 刷刷题