心脏冠状动脉螺旋CT成像时,必须加大扫描范围至锁骨下缘的是
A. 冠状动脉病变
B. 胸痛三联征
C. 冠状动脉支架术后
D. 冠状动脉痉挛
E. 冠状动脉搭桥术后
某工作站采用的时钟频率f为15MHz,处理速率为10MIPS的处理机来执行一个已知混合程序。假定每次存储器存储为1周期延迟,试问此计算机的有效CPI是______
A. 2
B. 2.5
C. 1.5
D. 1
______is based on the presumption that one can derive meaning from or reduce it to observable context.
A. Conceptualism
B. Mechanism
Contextualism
D. Behaviorism
When she heard the bad news, her eyes ______ with tears as she struggled to control her emotions.
A. sparkled
B. twinkled
C. radiated
D. glittered