发动机连杆杆身采用工字形横断面，具有（）和结构质量轻的优点。
参考答案：抗弯强度高
______Hepburn’s acting years, she insisted _______ working closely with UNICEF.
A．Though, to
B．Throughout, to
C．Throughout, on
D．Throughout, onto
A．a为动滑轮，B端钢缆受到滑轮组的拉力大小约为3G
B．a为动滑轮，B端钢缆受到滑轮组的拉力大小约为G
C．a、c为动滑轮，B端钢缆受到滑轮组的拉力大小约为3G
D．a、c为动滑轮，B端钢缆受到滑轮组的拉力大小约为G
G
G