患者剧烈活动后，应先休息多长时间后再测量脉搏与血压。（）
A.10—20min
B.15—20min
C.15—30min
D.30min
参考答案：B
3004005000读作______，省略万位后面的尾数用“万”作单位约是______．
Questions 11 to 18 are based on the passage you have just heard.
A．A secretary.
B．A novelist.
C．A newspaperman.
D．A businessman.
