GWD5-Q32求助题目中一句话的解释~

许楚iris

题目中有句话不太理解。。That regulation is about to be replaced by one that allows sale of fruit on which trace amounts of TDX residue are detected. 这里面的trace是取的哪个意思啊？谢谢！

colasama

trace：微量的

许楚iris

Which of the following most logically completes the argument?
Although the pesticide TDX has been widely used by fruit growers since the early 1960's, a regulation in force since 1960 has prohibited sale of fruit on which any TDX residue can be detected. That regulation is about to be replaced by one that allows sale of fruit on which trace amounts of TDX residue are detected. In fact, however, the change will not allow more TDX an fruit than was allowed in the 1960's, because_______.

A.Pre-techniques for detecting TDX residue could detect it only when it was present on fruit in more than the trace amounts allowed by the new regulations.
可我还是不理解这道题为什么选A啊TAT
A选项我也没理解是什么意思。。

sdcar2010

It's a math problem with reading comprehension as a means.

Premise: In 1960's, fruit found with TDX on it will not be on sale.

The conclusion says the the new regulation (to allow certain fruit with TDX level lower than a standard to be on sale)  would not allow more TDX on fruit than allowed in 1960's.

The reason? In 1960's, the level of TDX can be detected on the fruit is higher than the standard chosen by the new regulation. In other words, fruits having TDX amount lower than the standard had already been on sale in 1960's.

许楚iris

好像有一点明白了

teddybearj4

哦哦~sdcar2010NN的math problem的意思我终于懂了~

其实我感觉好像最重要的不是trace那里，而是however后面的“the change will not allow more TDX on fruit than was allowed in the 1960’s”，可以理解成以前现在不超过0.5含量的TDX都不算违规，而1960年只能检验出1以上的含量，1以下的就被认为是无TDX残留。也就是说非1960年的范围是>1，非现在的范围是>0.5。就正好对应了“the change will not allow more TDX on fruit than was allowed in the 1960’s”。

It's a math problem with reading comprehension as a means.

Premise: In 1960's, fruit found with TDX on it will not be on sale.

The conclusion says the the new regulation (to allow certain fruit with TDX level lower than a standard to be on sale)  would not allow more TDX on fruit than allowed in 1960's.

The reason? In 1960's, the level of TDX can be detected on the fruit is higher than the standard chosen by the new regulation. In other words, fruits having TDX amount lower than the standard had already been on sale in 1960's.

-- by 会员 sdcar2010 (2011/6/21 0:23:03)