8．Would it surprise you to learn that，like animals，trees communicate with each other and pass on their wealth to the next generation？
UBC Professor Simard explains how trees are much more complex than most of us ever imagined．Although Charles Darwin thought that trees are competing for survival of the fittest，Simard shows just how wrong he was．In fact，the opposite is true：trees survive through their co-operation and support，passing around necessary nutrition"depending on who needs it"．
Nitrogen（氮） and carbon are shared through miles of underground fungi（真菌）networks，making sure that all trees in the forest ecological system give and receive just the right amount to keep them all healthy．This hidden system works in a very similar way to the networks of neurons（神經(jīng)元）in our brains，and when one tree is destroyed，it affects all．
Simard talks about"mother trees"，usually the largest and oldest plants on which all other trees depend．She explains how dying trees pass on the wealth to the next generation，transporting important minerals to young trees so they may continue to grow．When humans cut down"mother trees"with no awareness of these highly complex"tree societies"or the networks on which they feed，we are reducing the chances of survival for the entire forest．
"We didn't take any notice of it．"Simard says sadly．"Dying trees move nutrition into the young trees before dying，but we never give them a chance．"If we could put across the message to the forestry industry，we could make a huge difference towards our environmental protection efforts for the future．
25．What would be the best title for the passage？C
A．Old Trees Communicate Like Humans
B．Young Trees Are In Need Of Protection
C．Trees Are More Complex Than You Think
D．Trees Contribute To Our Society
26．In Simard's opinion，treesA．
A．depend on each other
B．protect their own wealth
C．compete for survival
D．provide support for dying trees
27．We can learn from the passage thatD
A．"mother trees"are usually of no use to other trees．
B．Charles Darwin had the same thought as Simard．
C．people know much about the complex"tree societies"．
D．if"mother trees"are cut down，the survival for the entire forest will be affected．
28．The underlined word"it"in the last paragraph refers toB．
A．how trees grow old
B．how"tree societies"work
C．how forestry industry develops
D．how young trees survive．
分析 本文是一篇健康環(huán)保類閱讀．文章介紹樹和樹之間不是你死我活的競爭關(guān)系，它們之間是相互依賴的，快要死的樹會將自己的營養(yǎng)傳給小樹讓它們更好的成長．人們?nèi)绻肋@些現(xiàn)象，就可以更好的保護這些樹．
解答 25．C標題確定題．根據(jù)全文內(nèi)容，可知文章介紹樹和樹之間不是你死我活的競爭關(guān)系，它們之間是相互依賴的，快要死的樹會將自己的營養(yǎng)傳給小樹讓它們更好的成長．根據(jù)第一段Would it surprise you to learn that，like animals，trees communicate with each other and pass on their wealth to the next generation？可知作者想要表達的是樹要比我們想象的要更加令人驚嘆．故選C．
26．A細節(jié)理解題．根據(jù)第二段trees survive through their co-operation and support，passing around necessary nutrition"depending on who needs it"．可知樹木的生存通過它們的合作和支持，傳遞必要的營養(yǎng)"取決于誰需要它"．由此可知，樹木彼此依賴．故選A．
27．D細節(jié)理解題．根據(jù)第三段when one tree is destroyed，it affects all．可知當一棵樹被摧毀，它影響了所有樹．由此可知，如果"母親樹"被砍伐，整個森林的生存將受到影響．故選D．
28．B詞義猜測題．"it"出現(xiàn)在文章最后一段，實際上it指代的是第四段提到的內(nèi)容：人們砍倒快死的"母親樹"是不知道樹的社會的依存關(guān)系，可知it指的是"樹的社會"是怎么運作的．故選B．
點評 本文考察學生的理解推斷能力以及細心程度，只要抓住文章的關(guān)鍵詞，采用尋讀的方法查找細節(jié)，就能找到正確答案．
