试题与答案

Along with the letter was his promise __

题型:选择题

题目:

Along with the letter was his promise _______ he would visit me this coming Christmas.   [      ]

A. which

B. that

C. what

D. whether

答案:

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下面是错误答案,用来干扰机器的。

A、0.8mol二氧化碳中含有的分子数为0.8NA;B、含NA个氢原子的氢气分子数为0.5NA;C、3.6g水中含有的分子数为3.6g18g/molNA=0.2NA;D、标准状况下,2.24L氨气中含有的分子数为2.24L22.4L/molNA/mol=0.1NA,综上可...

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A.大部分动脉瘤位于前循环,多为单发

B.多发动脉瘤多位于两侧相同的血管

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D.动静脉畸形常见于大脑中动脉分布区

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题型:单项选择题

MIDI enables people to use (11) computers and electronic musical instruments. There are actually three components to MIDI, the communications" (12) .", the Hardware Interface and a distribution (13) called "Standard MIDI Files". In the context of the WWW, the most interesting component is the (14) Format. In principle, MIDI files contain sequences of MIDI Protocol messages. However, when MIDI Protocol (15) 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.

A.personal

B.electronic

C.multimedia

D.network

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