新生儿臂丛麻痹，调制中频电疗开始治疗时机定为伤后
A．1周
B．2周
C．3周
D．4周
E．5周
参考答案：B
It_______we had stayed together for a couple of weeks_______I found we had a lot in common. [ ]
A. was until; when
B. was until; that
C. wasn't until; when
D. wasn't until; that
用位移法计算图示刚架时，位移法方程的自由项F1P等于：（）
A.10kN·m
B.30kN·m
C.40kN·m
D.60kN·m
