牵引的治疗作用不正确的是()

A．解除肌肉痉挛

B．改善局部血液循环缓解疼痛

C．松解组织粘连，改善ROM

D．增大脊柱的椎间隙和椎间孔

E．增加肌力

An analyst does research about order types. The investor wants to profit from a predicted declines in the price of a company which she does not currently own. The most appropriate type of order is:

A. short sale.
B. limit order.
C. stop loss order.