【简答题】A.The original work of art increases in value. B.An artist has greater legal protection. C.Artists can sell their work abroad. D.Artists are allowed to make changes in their own works.
【判断题】The length of the cord of a simple pendulum is . If we decrease it to half of its original value, the frequency of the new simple pendulum is times of the original value. ...
【简答题】A stamp is worth a million and a half times its original value because ______. B) of its rareness and age C) few collectors have it D) it was made in British colonies