A bail has a gravitational pull of its own; but this is very small the pull of s
来源：网络
时间：
推荐文章
A bail has a gravitational pull of its own; but this is very small ________ the pull of something as large as the moon, the earth or the sun.
A.in relation of
B.on relation to
C.in relation to
D.with relation of
试题答案
C