【简答题】A.S-(R-S) B.R-(R-S) C.(R-S)∪S D.R∪(R-S)
【单选题】If you want to send a letter, you can go to the ____.
【单选题】If you want to send your recording email, connect the recorder your computer.
【单选题】If you want to send a letter, you should go to the ____________. [ ]
【单选题】If you want to send your recording ___ email, connect the recorder ___ your computer. [ ]
【单选题】--- What do you think of the book ? --- Oh , excellent . It’s worth __________ a second time .
【单选题】If you want to send a letter, you can go to the ____.
【判断题】随着压力的升高,汽化吸热量减小,过热吸热量逐渐增大,过热器和再热器的布置向烟温更高区发展。( )