下列哪项属异向共同运动（）。
A.右注视
B.左注视
C.辐辏
D.上转
E.下转
参考答案：C
解析：辐辏属于异向共同运动辐辏，辐辏是双眼共同内转。
You can’t imagine no one in the village _____ him and what difficulty we had ______ his family.
A．knowing ; finding
B．knew; to find
C．known; in finding
D．to know; found
常用的木排架可分为（）和构架式排架两种。
