八岁小儿脘腹胀痛，呕吐一次，气味酸腐，舌苔厚腻．证属
A．食积B．中寒C．湿热D．气滞
参考答案：A
People should ask the police for help when they are ____. [ ]
A. in dangerous
B. in safety
C. in danger
D. in safe
The value of a 5 - year semi-annul zero-coupon bond with a $ 500 maturity value and 9 percent discount rate is closest to:（）
A. $307.87.
B. $321.96.
C. $500.
