硬脊膜外麻醉是将麻醉药物注入硬脊膜和蛛网膜之间的腔隙。
参考答案:错
电纸书是一种新的载体,一种更符合人类阅读习惯的载体,也是最好的载体。一直以来,传统新闻出版业一直在寻求数字出版的新拓展,但是苦于没有清晰的商业模式,因此难以推进。电纸书出现以来,‘内容+终端’的模式被迅速证明是一条可以实行以及真正有效的模式,因此,可以说电纸书极大地点燃了新闻出版业数字化的热情,说是掀起了数字化革命一点也不为过。 这段文字意在说明( )。
A.电纸书是最符合人类阅读习惯的载体
B.“内容+终端”的模式是适合数字出版的商业模式
C.电纸书的出现促进了新闻出版业数字化的发展
D.电纸书的出现对于新闻出版业来说是一场数字化的革命
MIDI enables people to use () computers and electronic musical instruments. There are actually three components to MIDI, the communications " () ", the Hardware interface and a distribution () called "Standard MIDI Files". In the context of the WWW, the most interesting component is the () Format. In principle, MIDI files contain sequences of MIDI Protocol messages. However, when MIDI Protocol () are stored in MIDI files, the events are also time-stamped for playback in the proper sequence. Music delivered by MIDI files is the most common use of MIDI today.
the Hardware interface and a distribution () called "Standard MIDI Files".
A.format
B.text
C.wave
D.center