The company has developed a reputation as a technological laggard in the personal-computer arena.该公司在个人电脑领域因技术落后遭人诟病。Historical traces everywhere obviously: Constantine Mungu sports arena, four river eruptive fountains, ...
One end of the windpipe is connected with a unidirectional inflating valve.气管的一端与单向充气阀连接.Experiment materials: jar , windpipe, limewater, flume and the experiment record chart for each group.学生用材料: 广口瓶 、 导气管 、 石灰水、火柴、集气瓶...