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题库 / Prep2012-SC-39
In his experiments with gravity, Isaac Newton showed how the motion of each planet in the solar system results from the combined gravitational pull of the Sun and of all the other planets, each contributing according to their mass and distance from the others.
of all the other planets, each contributing according to their
of all the other planets, with each of them contributing according to their
all the other planets, each of which contributing according to its
all the other planets, each contributing according to its
all the other planets, each of which contribute according to their
题目分析：
不同选项mass的所有者不同，在(A)(B)(E)中，mass的所有者是their；在(C)(D)中，mass的所有者是its。请注意，all the other planets身前是否加of对于本题影响不大，加上或者不加均可。
选项分析：
A选项：each contributing according to their需改为 each contributing according to its。代词each是单数，their的指代对象是all the other planets，每一个行星只能由于自己的质量（mass）和距离（distance）决定，不能说是由于所有其他行星的质量和距离决定。
B选项：their应改为its错误同选项(A)。
C选项：each of which contributing according to its mass and distance from the others是非限定性定语从句，其中缺少谓语动词。
D选项：Correct. 本选项在语法和逻辑上均是正确的。
E选项：their应改为its错误同选项(A)；定语从句中的谓语动词contribute主谓一致有误。
有NN知道这句话什么所要表达意思吗？尤其是后半句
how the motion of all the other planets, each contributing according to its mass and distance from the others.
对于contribute也不是很理解，先谢~~~
这里有Ron大神对于C和D的解释http://www.beatthegmat.com/in-his-experiments-with-gravity-t80376.html
看懂了哈哈哈 好傻。。天呐
老铁~我一开始也是呆了一下
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没看懂c选项的解释
没看懂c选项
ABE THEIR应改成 IT C each of which 是非限制定从 要完整
“all the other planets身前是否加of对于本题影响不大，加上或者不加均可”
也就是说，each 对应 their，如果语义逻辑顺，也可以？
all the other planets身前是否加of对于本题影响不大，加上或者不加均可。
C 选项为什么不能理解为 ing形式做定语?
哈哈哈，网络有问题，一下刷了三条评论，好像还不能删除，这是个Bug么？
为啥不要of which？因为去掉of which更简洁有效吗？
为啥不要of which？因为去掉of which更简洁有效吗？
为啥不要of which？因为去掉of which更简洁有效吗？
each of which是定语从句，后面要跟完整的句子。只有each是独立主格，后面可以直接加分词修饰。
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