在奇经八脉中，与后溪相通的奇经是（）
A.任脉
B.督脉
C.阳维脉
D.阳蹯脉
E.冲脉
参考答案：B
Only after they had discussed the matter for several hours ________ a decision.[ ]
A. they reached
B. did they reach
C. they reach
D. do they reach
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