肌电图插入电位的延长或增多见于（）

A.失神经支配的肌肉或炎性肌病

B.严重的肌肉萎缩

C.肌肉纤维化

D.肌肉脂肪组织浸润

E.肌纤维兴奋性降低

Which of the following statements about the risks associated with investing in bonds is least accurate （）

A. Credit risk is the likelihood that an investor will be unable to sell the security quickly and at a fair price.

B. Reinvestment risk is the uncertainty about the rate at which cash flows from the security can be reinvested.

C. Volatility risk is the risk that the price of a bond with an embedded option will decline when expected yield volatility changes.