What else ______________ you do in winter? [ ]
A. does
B. do
C. done
答案：B
Mr Wang is leaving ________ Guangzhou next week. [ ]
A. to
B. with
C. in
D. for
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