XDF-section10-10（prep2-101 ）

The electronics company has unveiled what it claims to be the world's smallest network digital camcorder, the length of which is that of a handheld computer, and it weighs
            less than 11 ounces.

A. to be the world's smallest network digital camcorder, the length of which is that of a handheld computer, and it weighs

world没有生命不能加‘s结构。the length of which is that of a handheld computer, 作为一个句子与前一个句子之间没有连词，连词数等于句子数减一

B.to be the smallest network digital camcorder in the world, which is as long as a handheld computer, weighing

C.is the smallest network digital camcorder in the world, which is as long as a handheld computer, and it weighs

it 指代不清，如果用is，那么what it claims就是主语，unveiled后面接了SVO，就是一个宾语从句，但是宾语从句没有that，所以错

D.is the world's smallest network digital camcorder, which is as long as a handheld computer and weighs

E.is the world' s smallest network digital camcorder, the length of which is that of a handheld computer, weighing

我个人认为，B中weighing不可能修饰computer的，因为which两边都有逗号，可以作为插入语拿掉的。仅供参考，欢迎指正

谢谢啦~

不过“没有生命的词不能加‘s结构”这个不太同意，在我印象里是可以的呀，呵呵~