【单选题】When James Watt built his big steam-engines for industry, he invented a feedback device, a system which now plays a vital part in automation. Feedback【B1】that a machine can control its own【B2】. Watt's...
【简答题】听力原文:The trouble is that when things seem to go wrong, it may be too late to fix them, because you actually built the problem in from the start. It's vital that each member of the team knows exactly w...