影响血压的主要因素为()
A.心输出量和大动脉弹性
B.心输出量和外周阻力
C.外周阻力和大动脉弹性
D.外周阻力和心率
E.大动脉弹性和心率
参考答案:B
_____his body and soul to bringing up-to-date technology and international attention to China’s Aids problem,Dr David Ho , born in Taiwan, spent little time with his family.
A.Devoted
B.To devote
C.Being devoted
D.Devoting
1979年Greenford Myers出版的《the Art of Software Testing》一书除了介绍众多的测试经典方法之外,还向人们揭示了测试的目的是______。
A) 证真,而非证伪B) 证伪,而非证真C) 证真,且证伪D) 验证程序的正确性