27. GWD21-Q27:
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
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
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
这道题大家帮我分析下，答案是D，为啥是what it claims is？what引导的名词性从句是什么用法，这句话这样看有两个谓语，一个是unveil，一个是is，是我错了吧？另外撇开其他的不说，weighing这个用法对不对？
我看来unveil是主句谓语 is 是从句谓语 因此不冲突的
另外，weigh是和which后面的is 并列的，动作发出者是the smallest network digital camcorder ，而B得weighing动作发出者就变成 a handheld computer了
我不明白。如果是what it claims 是插入语的话，去掉应该不影响。
但是如果像楼上说的省略了that,但是那么that是放在unveil的后面引导宾语从句，而且是做主语的，肯定是不能省略。
突然觉得what it claims =that,觉得答案应该是E了。
A中觉得and不应该有逗号，and连接两个句子。
B中which就近修饰world了，但是逻辑主语应该指代camcorder,后面的weighting是名词，和从句不平行。
C中which就近修饰world了，但是逻辑主语应该指代camcorder
D中and前是which从句，后面是动名词，不平行。
E正确，what it claims =that，is就顺理成章了，the length of.......,weighting(有n的感觉和length对称)........共同修饰那个摄像机。
D中and前是which从句，后面是动名词，不平行
错了，不要被误导，对不起大家。还在琢磨这道题。
E中觉得有个毛病是如果用weighting和the length一起修饰那个摄像机的话，是不是中间的逗号应该用and来代替？
这样的话答案就应该是D了。and应该和逗号不同时使用而and优于逗号，我现在认为选D。
the length of which is that of that of a handheld computer的表達不符合邏輯
沒有說A的長度是B的長度這種說法，都是說A跟B一樣長。
我真的覺得GMAT是考邏輯
A do B,doing C.如果不表示伴随结果，doing C有很大的修饰歧义，逻辑上可能修饰A，也可能修饰B，语法上修饰B，所以如果逻辑上确实修饰A，那么就错了。A do B，which，这时which临近修饰B。
首先，很多人说what前面省略了that，但是gmat语法中宾语从句是不可以省略that的，所以我觉得不妥。
我觉得it claims才是插入语，把它拿掉就可以读通了。
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