体外循环抗凝血，宜选用（）A．肝素 B．新抗凝 C．华法林 D．双香豆素 E．新双香

Green economy offers a new model ________ people could both protect the climate and develop the economy, according to what Li said at the International Cooperative Conference on Green Economy and Climate Change.

A．how

B．why

C．where

D．which

会计责任与审计责任不能相互替代、减轻或免除。 ( )

专门贸易

结婚戒指应戴在哪个手指上？（）

A.食指

B.中指

C.无名指