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Motorists who used to listen to the radio or their favorite tunes on CDs may have a new way to entertain themselves, after engineers in Japan developed a musical road surface. A team from the Hokkaido Industrial Research Institute has built a number of 'melody roads', which use cars as tuning forks(音叉)to play music as they travel. The concept works by using grooves(凹槽). They are cut at very specific intervals in the road surface. The melody road uses the spaces between to create different notes. Depending on how far apart the grooves are, a car moving over them will produce a series of high or low notes, and designers are able to create a distinct tune. Patent documents for the design describe it as notches(刻痕) 'formed in a road surface so as to play a melody without producing simple sound or rhythm and reproduce melodylike tones'. There are three musical strips in central and northern Japan-one of which plays the tune of a Japanese pop song. Reports say the system was invented by Shizuo Shinoda. He scraped some markings into a road with a bulldozer(推土机)before driving over them and found that they helped to produce all kinds of tones. The optimal speed for melody road is 44 kph, but people say it is not always easy to get the intended sound. 'You need to keep the car windows closed to hear well,' wrote one Japanese blogger. 'Driving too fast will sound like playing fast forward, while driving around 12 mph[20 km/h]has a slowmotion effect, making you almost carsick.' 1. According to the passage, melody roads use________to create different notes. A. cars B. grooves C. spaces between intervals D. bulldozers 2. We can learn from the passage that the highness of notes is depended on________. A. how far the grooves are B. how big the grooves are C. the number of the grooves D. the speed of the car 3. The underlined word 'optimal' in the passage might mean________. A. fastest B. possible C. best D. suitable 4. In order to hear the music well, you have to________. A. drive very fast B. drive slowly C. open the windows wide D. keep the windows closed 5. What's the best title of the passage? A. A New Type of Music B. Melody Roads in Japan C. A Musical Road Surface D. A New Invention in Japan
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【单选题】在只有一个投资项目可供选择的条件下,如果该项目不具有财务可行性,则必然会存在的一种情况是( )
A.
净现值NPV〉〉〉0
B.
获利指数PI 1
C.
净现值率VPVR 0
D.
内部收益率IRR ic
【判断题】心动周期指心室收缩或舒张一次
A.
正确
B.
错误
【单选题】心动周期是指
A.
心室收缩和舒张一次
B.
心房收缩和舒张一次
C.
心房或心室每舒张一次
D.
心房和心室每收缩和舒张一次
E.
心脏收缩一次
【单选题】心动周期指的是( )。
A.
心房收缩和舒张一次
B.
心室收缩和舒张一次
C.
心房或心室每舒张一次
D.
心房和心室每收缩和舒张一次
E.
心脏收缩一次
【判断题】心动周期指心室收缩或舒张一次。
A.
正确
B.
错误
【单选题】心动周期是指
A.
心房收缩和舒张一次
B.
心室收缩和舒张一次
C.
心房或心室每舒张一次
D.
心房和心室每收缩和舒张一次
E.
心脏收缩一次
【单选题】骨髓涂片需抽取的骨髓液量为
A.
0.1~0.2ml
B.
0.2~0.5ml
C.
0.5~1ml
D.
1~2ml
E.
2~5ml
【多选题】作业人员的基本条件之一:具备必要的电气知识和业务技能,且()
A.
全面掌握安全规程
B.
有一定的组织能力
C.
按工作性质,熟悉《安规》的相关部分
D.
经《安规》考试合格
【单选题】26岁初产妇,妊娠41周临产后7小时出现烦躁不安,自述下腹疼痛难忍。检查腹部见病理缩复环,下腹拒按,胎心听不清,导尿为血尿。此病例应诊断为( )
A.
先兆子宫破裂
B.
子宫破裂
C.
重型胎盘早剥
D.
妊娠合并急性阑尾炎
E.
妊娠合并胆囊炎
【简答题】使波特率为 9600 的初始化是 。
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