关于９月ＪＪ里ＲＣ的crayfish and catfish

９月ＪＪ里ＲＣ的crayfish and catfish

听说是ＧＷＤ　的

请问有ＮＮ能提供原文参考吗

谢谢！！

同问同问，哪位好心人知道出处的告诉一下啊，我怎么也找不到

The fatty acid composition of total lipids（脂）
            from edible portions of pond-reared prawn, catfish, and crayfish were compared with those of their wild counterparts. It was found that the lipids of the cultured animals had higher levels of ω6 fatty acids and lower ω3 fatty acid levels and ω3/ω6 ratios compared with their wild counterparts. The pelleted catfish diet was rich in ω6 fatty acids. It was concluded that the lipids of pond-reared fish and shellfish may not have the high levels of ω3 fatty acids found in wild seafood, and that the feasibility of increasing the ω3 fatty acid content by dietary manipulation, needs to be investigated

这是一篇帮助阅读，希望有用

29.   (31650-!-item-!-188;#058&004636)

To reduce the danger to life and property posed by major earthquakes, scientists have been investigating several techniques for giving advance warning of dangerous earthquakes.  Since catfish swim erratically before earthquakes, some investigators have proposed monitoring catfish to predict dangerous earthquakes.

Which of the following, if true, most seriously undermines the usefulness of the proposal?

(A) In Japan, which is subject to frequent earthquakes, the behavior of catfish has long been associated with earthquakes.

(B) Mechanical methods for detecting earthquakes have not proved effective.

(C) Tremors lead to the release of hydrogen sulfide gas into water, thereby causing various fish and shellfish to behave erratically.

(D) Careful construction can reduce the dangers posed by earthquakes.

(E) Even very slight, fleeting tremors cause catfish to swim erratically.