串匹配算法的本质是( )
A．串复制
B．串比较
C．子串定位
D．子串链接
参考答案：C
The car ____and stopped at the red traffic light.
A．got on
B．got off
C．slowed down
D．picked up
患者呕吐清水痰涎，脘闷食少，时有头晕心悸，舌苔白腻，脉滑。其诊断是
A．呕吐外邪犯胃证
B．呕吐脾胃虚寒证
C．呕吐痰饮内阻证
D．心悸水饮凌心证
E．眩晕痰浊中阻证
