AWA:
A
Due to the decline demand of the mining technology, all the realted corporations are sufferring form decline of profit and sales this year, including Blastcom Corporation. Blastcom Corporation is considering adopting one growth strategy: to shift some of the researchers from mining technology to the renewable energy technology, the demand for the renewable enenergy such as solar energy. Some of the prominent companies which markets the renewable energy are successful in recent years. Therefore, it is garanteed that company X will also be successful in the furture by providing renewable energy.
I
No art exhibition or public performance should be cancelled because of the community's objection to its content.
Q:
1.一个数在线依序为 X= -7/8 y=-5/24 Z未知，若xz的距离比yz的距离多4倍，问Z为多少?
我有印象的选项为1/8, -1/72, 1/72
2.10^98-1 被 11除问余数? 有印象的选项有 0,1,9
3.38X49X250021(确切数字忘了)最接近下列何者
10^7 ,10^8,10^9,10^10,10^11
4. X存在半年利率为2%的利息等于将10,000 存在季利率4%的利率，问X为多少?
5. 1/41+1/42+1/43+1/44 范围 我是选 >1/11
RC
印象中有一题为wasp攻击caterpillar的文章，caterpillar吃的植物会分泌一种物质，这种物质会吸引wasp，从而植物透过此分泌物质来保护自己不被caterpillar吃
刚刚找了一个相似的原文，希望其他人来确认一下
Parasitic and predatory arthropods often prevent plants from being severely damaged by killing herbivores as they feed on the plants.
Recent studies show that a variety of plants, when injured by herbivores, emit chemical signals that guide natural enemies to the herbivores. It is unlikely that herbivore-damaged plants initiate the production of chemicals solely to attract parasitoids and predators. The signaling role probably evolved secondarily from plant responses that produce toxins and deterrents against herbivores and antibiotics against pathogens. To effectively function as signals for natural enemies, the emitted volatiles should be clearly distinguishable from background odors, specific for prey or host species that feed on the plant, and emitted at times when the natural enemies forage. Our studies on the phenomena of herbivore-induced emissions of volatiles in corn and cotton plants and studies conducted by others indicate that (i) the clarity of the volatile signals is high, as they are unique for herbivore damage, produced in relatively large amounts, and easily distinguishable from background odors; (ii) specificity is limited when different herbivores feed on the same plant species but high as far as odors emitted by different plant species and genotypes are concerned; (iii) the signals are timed so that they are mainly released during the daytime, when natural enemies tend to forage, and they wane slowly after herbivore stops.
开始准备九月的二战啰
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发表于 2009-7-17 18:23:00
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