下列药物的含量测定方法为：水杨酸钠（）. A．三点校正的紫外分光光度法  B．高效液

由器质性病变导致的长期开口困难称为()

A．癔症性牙关紧闭

B．咀嚼肌群痉挛

C．颞下颌关节强直

D．破伤风后牙关紧闭

E．关节盘移位

心肌损伤的心电图改变是（）

A．ST段下移 

B．ST段明显上抬，呈弓背向上的单向曲线 

C．T波高耸 

D．T波倒置 

E．异常深而宽的Q波

砂仁的功效是

A．补气安胎

B．清热安胎

C．理气安胎

D．止血安胎

E．补肝肾安胎

某股票的β值反映该股票收益率变动与整个股票市场收益率变动之间的相关程度。 ( )

Information theory is related to the quantification of information. This was developed by Claude E. Shannon to who found fundamental limits on ( ) operations such as compressing data and on reliably storing and communicating data.

A. signal

B. data

C. information

D. signal processing