A basic assumption of technical analysis in contrast to fundamental analysis is that:（）

A. security prices move in patterns, which repeat over long periods.

B. aggregate supply of and demand for goods and services are key determinants of stock value.

C. a stock’s market price will approach its intrinsic value over time.

女性，25岁，因背部发现肿块前来就诊，查体肿块活动度好，大小约1．51cm×1cm，拟行局麻下肿块切除术。

出现呼吸困难和胸闷最可能的原因是（）。

A.局麻药毒性反应

B.药液误入椎管内

C.喉返神经阻滞

D.膈神经阻滞

E.气胸