142. A computer equipped with signature-recognition software, which restricts access to acomputer to those people whose signatures are on file, identifies a person’s signature byanalyzing not only the form of the signature but also such characteristics as pen pressureand signing speed. Even the most adept forgers cannot duplicate all of the characteristics the program analyzes.

Which of the following can be logically concluded from the passage above?

(A) The time it takes to record and analyze a signature makes the software impractical for everyday use.

(B) Computers equipped with the software will soon be installed in most banks.

(C) Nobody can gain access to a computer equipped with the software solely by virtue of

skill at forging signatures.

(D) Signature-recognition software has taken many years to develop and perfect.

(E) In many cases even authorized users are denied legitimate access to computers

equipped with the software.

Answer: C. What I don't understand is the explaination to Choice E: "The passages give no reason to think that errors of the sort that choice E describes,even if made, would be numerous." So if I change Choice E to "Even authorized users may be denied legitimate access to computersequipped with the software", can it be a conclusion from the argument?

Why "many" in E is so important?

和这题类似的有一个是 说什么冬冬是用指纹来打开的，具体题目我记不清了，但是和这题很类似。

这题C的正确性十分明显，这是其一

至于E的错误，就是在于这个MANY,

无论从原文的哪一个地方都无法得出MANY 这个结论，只能说是有这种现象发生，原文中没有任何一处说明了这种现象的发生是很频繁的啊。所以这个many无从谈起。

如果我把这个many改成sevral也是不对的，因为原文没有对事件发生的频率作出说明。

指纹那题以后你再看到了就会弄清这题的。