骨折固定应保持在
A．休息位B．抗痉挛位C．功能位D．伸展位E．屈曲位
参考答案：C
单项选择。
Tom and Kate _____ a very good time at the party last night. [ ]
A. has
B. have
C. had
D. having
在空气调节中，空气的温度单位通常采用（）。
