进行初始化即可自动获得初值0的变量包括( )。A．任何用static 修饰的变量

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，并在答题卡上将该项涂黑。选项中有两项为多余选项。

Doctors Say Most Heart Disease Preventable

Heart disease is the number one killer, worldwide, of men and women over the age of 60. But people of all ages die of heart attacks each year. And while death rates have declined in the U.S. and many western European countries, they are on the rise in the developing world.   小题1: .

No one would have guessed that Barbara Teng would have a heart attack. She was not overweight. She did not smoke or exercise. “In 2004, the week after I turned 49, when I was on a business trip in Chicago, I had a major heart attack," she said.   小题2:  . She now exercises daily, and monitors her heart health.

Dr. Patrice Nickens, who is with the National Heart, Lung and Blood Institute, thinks that heart disease is 82 percent preventable. “ 小题3:  ,” she said, “Men are also facing the same problem, and the key to staying healthy is knowing your numbers”.

“Your weight, your blood cholesterol, blood sugar and your blood pressure are important numbers that can help you take action and reduce your risk,” she said.

 小题4:  .

“And the steps to take are simple: don’t smoke, maintain a healthy weight, exercise, know your numbers and talk to your physician and control these risks,” she said.

African-Americans are at higher-than-average risk for heart disease and stroke; people don't even know they have it, which increases the risk. Medstar Washington Hospital Center is trying to reach this population.   小题5:  . For example, helping the people monitor their blood pressure. If people realize they are at risk for heart disease, they'll make lifestyle changes: lose weight, exercise, eat the right foods and keep in touch with a doctor. 

A．A healthy lifestyle can prevent heart disease

B．So we must cure heart disease

C．It is the leading cause of death for women

D．With the right training, they can play an important role in community healthE. And that changed her life

F. Lack of exercise causes heart attacks

G. Yet most heart disease is preventable.

据报道双氧水接触银能剧烈反应，为消除用硝酸清洗试管内壁上的银时产生的有毒气体污染环境，体现“绿色化学”的理念，某学校活动小组利用该反应清洗试管内壁上的银，并进一步研究反应的机理。他们查阅资料（资料信息：硝酸氧化性比过氧化氢强，能氧化过氧化氢；碘化银为黄色固体；稀硝酸与银单质反应条件为加热），设计并完成了以下实验。

第一步 清洗：取10 mL 10% H₂O₂溶液清洗附有银的试管。反应剧烈，并产生大量的气体（经验证为氧气），试管内壁上的银全部被清除干净，最后得澄清透明液体a。用激光照射液体a能看到丁达尔效应。

第二步 探究反应原理：取2支试管，分别取液体a约1 mL，稀释至3 mL得液体b。学生甲：将1支盛有液体b的试管进行如下实验

学生乙：向液体b中加入4～5滴稀硝酸酸化的2 mol/LNaCl溶液，溶液中出现白色沉淀。通过上述实验，他们认为H₂O₂氧化了银单质。

请回答：

（1）液体a在分散系分类中属于__________。

（2）操作x名称是__________。

（3）学生甲在液体b中加入碘化钾溶液，没有看到预期的黄色的碘化银沉淀，可能的原因是_______（填序号）。

①液体a中的银元素大多数以银单质的形式存在

②过量的H₂O₂将I^-氧化为I₂

③加入的碘化钾溶液量太少

（4）学生乙在实验中加入4～5滴稀硝酸酸化的原因是__________。

（5）为探究银与H₂O₂反应生成的物质是否会对H₂O₂的分解有催化作用。进一步完成下列实验。向1 mL 1mol/LAgNO₃溶液中加入1滴2 mol/L NaOH溶液，出现棕色沉淀，继续加入3mL10% H₂O₂溶液产生大量的气体。

①该实验并不能达到实验目的，还需要做对比实验，请设计对比实验的方案___________________。

②如果银与H₂O₂反应生成的物质对H₂O₂的分解有催化作用，通过实验和理论上分析可以得到，起催化作用的物质是__________。

下列不属于在一人委托多人的委托—代理模型需要考虑的因素是（）.

A.打破预算平衡模型

B.考虑逆向选择模型

C.合作型模型

D.考虑顺向选择模型

反映企业盈利能力的核心指标是（）。

A.利润

B.净资产收益率

C.总资产净利率

D.平均净资产

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