听录音,补充句子,再画图。 1. There is a book ____________ the table. 2. There is a ball ____________ the table. 3. There is a lamp ____________ the table. 4. There is a trash bin ____________ the table. 5. There is a picture ____________ the table.
【单选题】Who was the author of The Wealth of Nations in which it is stated that an individual who intends his own gain is led by an invisible hand to promote an end that was not part of his intention?