—He asked her_________the bag because it was too expensive．

A．not to buy

B．to buy not

C．not buying

D．not buy

男性，60岁，患皮质醇症而入院，此症病人在活动时应注意防止因骨质疏松而引起的（）

A.肌萎缩

B.病理性骨折

C.股部皮肤紫纹

D.四肢无力

E.性腺功能紊乱