For a given level of technology, we should expect an increase in productivity within a nation when there is an increase in each of the following except
【简答题】边读边想,翻译下面的谜语并写出谜底。 Riddle I have two red eyes. I have two long ears. I like carrots (萝卜) . Everybody likes me. 谜语 我有两只红眼睛 ___________________________ ___________________________ ______________________...