A选项：neither...nor...but rather; rather是连词，不能接句子；
BC选项：neither ...nor...不平行；
E选项：covering the entire planet的主语应该是crust, not Earth.

A its 和it 指代不一致
B C neither nor 平行原则错
E covering发出者应该是crust 而不是earth

请问A中用its为什么没问题？ 即使可以指代crust，不也应该用it吗？its是possessive pronoun，应该修饰名词而不能单独做主语吧
Mark点：D选项中But是在neither..nor那个层次的，如果是和although一个层次则会有问题，同一个句子中不能同时用although,but表转折

(Although it covers the entire planet), 修饰主句，although but不是连用
Earth's crust is neither seamless nor stationary, but rather(is) fragmented into mobile semirigid plates.
but连接两个谓语动词时可以省略第二个

不太懂啊,although不是不与but连用吗

neither…nor…是平行触发语，其连接的两者需要在语法形式上保持一致。
粗心选了B

补充一个OG关于E选项的解释：Although is a conjunction and should not be followed by a finite clause with a subject, not by a principle.

在别处看到的补充，请大家指正：
OG13-36题未划线处有说到although growing slowly的表达：
Along with the drop in producer prices announced yesterday, the strong retail sales figures released today seem to indicate that the economy, although growing slowly, is not nearing a recession.
Although 后面接不完整句子 逻辑主语必须一致。

1. despite + noun is a the correct idiom. Example: Despite heavy snow, we went to the concert.
2. depite + verb-ing (doing) is also a correct idiom where verb-ing is a noun. Example: Despite finishing all her work on time, Mary could not go to meet her friend.

老师或者同学可以讲一下在GMAT中，although, though 的用法吗？although是不是后面只能接句子才算对？

D选项为什么不直接用伴随状语 it这个指代感觉多余

Despite是介词，后面需要跟名词或者名词短语。 Athough是连词后面要跟完整句子。

although和but可以连用么？

A选项despite doing修饰的难道不是主句主语earth吗，为啥指代对象没有问题呀

A选项中的【covering】是名词，直接与名词【the entire plant】放在一起是不是也有问题呢？

but rather和but一样吗

名词和动词的区别。

A 与主句主语不一致，its指crust，despite...是独立主格，但独立主格前貌似只能加with或者不加；
B neither…nor…平行制造者；
C 同B;
D ；
E 伴随状语逻辑论元不对；

想请教，C选项，ing不能是伴随状语吗？另，如果还是按照名词和动词比较，主句的逻辑已经更改，不是earth has crust了。而是crust is。。。预设语义还是不能用名词吗？

对啦，B选项：the fact的添加，又让it covers the entire planet变成了一个事实，和名词短语的作用相仿