【单选题】They had great fun ________. on the beach last Sunday.
【单选题】--- Did they____ fun in the music room? --- Yes, they had great fun ______ the music.
【判断题】正火与退火的主要区别在于冷却速度的快慢,正火冷却速度较快,过冷度较大。
【单选题】The last time they had great fun was_________ they were leaving college. [ ]
【多选题】PLC的输入模块一般采用( )技术,进行外部电路和内部电路的隔离,最终达到( )目的 。
【单选题】They had great fun _________ kites In the country.
【单选题】They had great fun _______ a picnic with their good friends. [ ]
【判断题】正火与退火的主要区别在于冷却速度不同,正火冷却速度较大。
【判断题】在潜水面上将高程相同的点即潜水位相同的点相连,即为潜水面的等水位线图。
【单选题】They had great fun _____ soccer yesterday. [ ]