锐痛常见于
A．急性外伤B．腰肌劳损C．紧张性头痛D．类风湿性关节炎E．慢性内脏炎症
参考答案：A
The Group of Eight (G8) ______ the eight richest countries in the world.
A．is made up
B．consists of
C．is consisted of
D．consist of
具有调理作用的是
A．抗原
B．抗原和补体
C．抗体和补体
D．补体
E．抗体
