发布时间：2016-03-15 来源：环球网校 发布人：wyznl
The most sophisticated （先进的） Japanese robots, which have vision systems and work at very high speeds, are still based on American designs. Studies of robots, particularly computer control software, are considered to be generally less advanced in Japan than in America or Europe.
Even the most sophisticated Japanese robots are__________.
A、free of charge
B、based on American designs