下列做法有利于我们理解父母的有[ ]
A、宽容父母的一切过错
B、将心比心，换位思考
C、给父母送生日礼物
D、帮助父母做家务
答案：B
Which of the following condition is least likely to be the reason that a black market is generally inefficient（）
A. Unenforceable contract.
B. Increased prices required by suppliers due to the risk of prosecution.
C. Intensive control by the government.
说明柳永在词的艺术表现上的创新。
