硅钼蓝光度法测定水中可溶性二氧化硅时，对含有悬浮物的水样，用（）过滤后进行测定。A.

某甲的儿子患重病住院，急需用钱，某乙趁机表示愿意借给甲2000元，但半年内需加倍偿还，否则以甲的房子代偿，甲表示同意，根据合同法规定，甲、乙之间的借款合同（）

A．因显失公平而无效

B．因显失公平而可撤销

C．因乘人之危而无效

D．因乘人之危而可撤销

粘连性肠梗阻的腹部X片征象为（）

A.单泡征

B.双泡征

C.阶梯状液平面

D.膈下游离气体

E.气液面浅而小、分布散在

构建社会主义和谐社会，要着力提高低收入者收入水平，逐步扩大中等收入者比重，防止出现个人收入差距的过分悬殊。要实现这一点的根本之策是

A．大力发展经济

B．确立生产要素按贡献参与分配的原则

C．提高低收入者的基本生活保障水平

D．加强对收入分配的调节

企业的实体分析是自顶向下规划的第二层求精，包括许多步骤，下列哪个步骤技术是对企业实体的概括

A．实体的确定

B．实体的抽象

C．实体―联系图

D．实体映射

第二节：（共5小题；每小韪分，满分10分）

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。选项中有多余选项。

  51  The goal here is to limit carbon dioxide and other green house gases, which are closely associated to the big problem of global-warming．

Strategy 1: Bring your own cup to Starbucks

You’ll get a 10 cent discount, and it’s one less paper cup to end up in a landfill．While you’re there, pick up some free bags of spent coffee grounds to use as  ‘‘green’’  fertilizer in your garden．

The payoff:   52 

Strategy2: Turn off your computer

When in standby mode, your PC is still using energy．  53 

The payoff: Turning off a monitor for 40 hours a week may only save $5 a month, but it reduces CO2 by 750 pounds

Strategy 3: Reuse plastic bags

Instead of throwing away 100 billion plastic bags a year, try and get a second, third, or tenth use out of them．Better yet, next time you shop, try a reusable bag．

The payoff:   54 The amount of oil it would take to make just 14 plastic bags would run your car for one mile．

Strategy4: Use recycled paper in the bathroom

Most of the toilet paper we use is made from trees found in forests previously untouched by humans．

The payoff: If every household replaced one roll of toilet paper with a recycled one, 424000 trees would still be standing．Look for eco paper towels too．

Strategy5: Buy energy-efficient appliances（电器）

Replace the old fridge with an Energy Star appliance and you’ll use 15 percent less energy．  55  

The payoff: If we all used one Energy Star appliance at home, it would be like planting 1．7 million acres of new trees．

A．You can be proud of yourselves, even if you can only make one or two of these green changes.

B．Adding green to your garden is beautiful and earth-pleasing.

C．It might be a little expensive to buy, but you’ll save money on your electricity bills and help the environment．

D．In fact, 75percent of electricity used in your home comes from electronics that are turned off．E．The store won’t create more waste when they throw away a cup．

F．The store won’t create more waste when they throw away a cup.

G．Just one tree will help make cleaner air and save the environment from 5000 pounds of hot carbon dioxide each year.