（）认为，天下与君主的关系应该是“天下为主，君为客”的关系。
参考答案：黄宗羲
Yao Ming, who ______ the Houston Rockets, is working hard to make his dream come true.
A．joined
B．joined in
C．took part in
D．competed in
具有活血，行气功效的药物是（）
A.桃仁
B.红花
C.丹参
D.川芎
E.五灵脂
