神经损伤后，神经功能恢复最好的是
A．直接缝合皮肤B．凡士林纱布覆盖包扎C．中厚游离皮片移植D．邻指带蒂皮瓣E．腹股沟轴型皮瓣
参考答案：B
The young dancers looked so charming in their beautiful clothes that we took pictures of them. [ ]
A. many of
B. masses of
C. the number of
D. a large amount of
O为杠杆OAB的支点，请画出杠杆OAB所受两个拉力的力臂．
