目前,在国内BOPET一般使用()油墨进行印刷。 ["苯溶性","氯化聚丙烯","聚酰胺","聚氨酯"]
胡锦涛强调,()军队建设的重要基础,是军队信息化建设的重要保证 ["革命化","现代化","正规化","信息化"]
下列空调比R值中,哪一组为功率混合气()。 ["R<15","R=1.58—17.8","R≤6","R=12.8—14.2"]
To be frank, ()is a great joy for me to win the prize. ["this","that","it","there"]
升降台的安全保护装置主要有() ["安全防护罩","防护挡板","防护栏","安全限位开关"]
如何判断集装箱适于运送货物?