《类经》云：“经犹大地之江河，络犹原野之百川”是指（）。 A.经与络的区别 B.经与

下列主要引起纤维性疾病的毒物是（）

A.一氧化碳、二氧化硫

B.甲基汞

C.农药中毒

D.粉尘

E.石油裂解气

A deadly strain of avian flu may have passed between people for the first time, experts believe.The avian influenza A (H7N9) virus is thought to have been transmitted between father and daughter in eastern China, according to research published online by the British Medical Journal (BMJ).

The findings provide the strongest evidence yet of H7N9 transmission between humans since its discover in February, but its ability to transmit itself was deemed "limited and non-sustainable" by the Chinese researchers behind the study.At the end of June 133 cases had been reported, including 43 deaths. Most infections have been among people visiting markets, selling live birds or among those who had contact with live poultry（家禽） in the seven to 10 days before becoming ill.

The latest study examined the case of a 60-year-old father who regularly visited a live poultry market and became ill five to six days after his last visit in March. He was admitted to hospital with fever, cough and shortness of breath. Despite intensive care treatment he died of multiple organ failure on 4 May. His 32-year-old daughter, who was previously healthy, looked after him at his bedside before he was admitted to intensive care. She had no known exposure to live poultry before falling ill with a very high temperature, cough and fever. The daughter developed symptoms six days after her last contact with her father and was admitted to hospital where she died of multiple organ failure on 24 April.

Follow-up investigations(调查) uncovered almost genetically identical virus strains from each patient, suggesting transmission from father to daughter. Another 43 people were also tested who had had close contact with the father, daughter or both.

Dr Peter Horby, senior clinical research fellow at the Oxford University Clinical Research Unit in Hanoi, Vietnam, said of the study: "The most likely source of infection for the daughter was her father, during the period that she cared for him while he was ill. "He said “limited person to person transmission had been reported for other strains like H5N1 , H7N7, and the pig origin flu virus H3N2. Those strains had been around for more than a decade but have not progressed any further down the path towards a world-wide virus.” “Limited human-to-human transmission of H7N9 virus is therefore not surprising, but strengthening to monitor it was still needed,” Dr Horby added.

小题1:What’s the main idea of the passage ?

A．The findings about H7N9 transmission only between father and daughter .

B．H7N9 transmission may be spreading between people .

C．133 cases of H7N9 transmission have been reported .

D．Both the father and daughter died of multiple organ failure.小题2:The reason why the daughter died of multiple organ failure was that _____.

A．she fell ill with a very high temperature, cough and fever.

B．she was exposed to live poultry before falling ill.

C．she had close contact with the father while caring for her sick father .

D．she sold live birds in five to six days before falling ill .小题3:Which of the following is Wrong about H7N9 transmission?

A．It was limited and non-sustainable

B．It was person to person transmission

C．It wasn’t progressed any further down the path towards a world-wide virus.

D．It happened between father and daughter .小题4:The underlined word s “was deemed” in paragraph 2 probably means _______

A．was decreased

B．was regarded as

C．was thought of

D．was developed小题5:What type of writing is the article likely to be ?

A．A news report.

B．Popular science.

C．A medical report

D．A medical findings

　　(一)某工业开发区通过征地方式获得1平方公里O土地进行一级开发，计划达到“五通一平”后按工业用地分块出让。该地区土地取得费用平均为15万元/亩(含征地费用及相关税费)，达到“五通一平”条件的开发费用(含管理费和开发阶段的税费)平均为2亿元/平方公里。征地完成后，土地开发周期为2年，第一年内投入开发费用的60%，第二年内投入剩余的40%。假设银行贷款年利率为7%，当地一级开发的投资利润率为15%，类似土地开发的土地增值收益率为20%，土地还原率为9%。预计开发完成后可用于出让的面积比例为70%。　　请就上述内容，回答71 -75小题的问题。

土地开发期间所负担的利息总额为( )万元。

A．2975

B．4717

C．4817

D．5559

阅读下面文字，回答相关问题。

元素周期表是元素周期律的具体表现形式，是我们学习化学的工具。元素在周期表中的位置，反映了元素的原子结构和元素的性质。我们可以根据元素在周期表中的位置推测其原子结构和性质，也可以根据元素的原子结构推测它在周期表中的位置。

请回答下列问题：

（1）有人说"氦的最外层电子数为2，应该把它放在第ⅡA族"，你认为这样编排元素周期表有何利弊？

（2）结合化学教学实践，论述三序结合的原则在化学教材编写中"原子结构和元素周期表"理论部分的应用。

解释古树名木的存活原因，危及古树衰老死亡的环境因素有哪些？