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读亚欧大陆气温年较差分布示意图（单位：℃），回答下列各题。

关于图示地区气温年较差变化规律的叙述，不正确的是（）

A．同纬度地区从沿海向内陆气温年较差越来越大

B．甲处气温年较差可能为60度

C．一般来说，纬度越低，气温年较差越大

D．甲乙线比甲丙线气温年较差变化梯度小

答案

参考答案：C

解析：

读图，根据数值变化规律，同纬度地区从沿海向内陆气温年较差越来越大，A正确。甲处气温年较差在56-64度之间，可能为60度，B正确。图中东部沿海气温年较差较大，C不正确，选C。甲乙线比甲丙线气温年较差变化梯度小，D正确。

填空题

Fill in the blanks with the right forms of the given words. 用所给单词的适当形式填空。

1. We usually wear                 (short) in summer. 

2. I need a pair of           (run) to play basketball. 

3. Our teacher            (teach) us a song yesterday.

4. I           (go) on a trip to Beijing next week. 

5.              ( Bob) team won the basketball game.
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单项选择题

Current Group, a Germantown-based technology firm, has taken over an ordinary looking house in Bethesda and turned it into a laboratory for smart-grid technology, the system the company believes will bring the nation’s electricity grids into the digital age.
In the front yard stands a utility pole hooked up to a special transformer that connects the power lines to high-speed Internet. Hundreds of sensors attached to the lines monitor how power flows through the home. That information is then sent back to the utility company.
The process lets a utility more efficiently manage the distribution of electricity by allowing two-way communication between consumers and energy suppliers via the broadband network on the power lines. Based on data they receive from hundreds of homes, utilities can monitor usage and adjust output and pricing in response to demand. Consumers can be rewarded with reduced rates by cutting back on consumption during peak periods. And computerized substations can talk to each other so overloaded circuits hand off electricity to those that have not fully loaded, helping to prevent blackouts.
Some utility companies have launched initiatives to give consumers data about their energy consumption habits in an effort to lower energy bills. Smart-grid technology takes such programs further by automating electricity distribution, which would make grids more reliable and efficient.
By partnering with utilities, the company hopes to tap into $4.5 billion in stimulus grants intended to encourage smart-grid development. When he announced the funding, President Obama pointed to a project in Boulder, Colo. , as an example of a successful smart-grid experiment. Current is one of the companies working on the project.
Current’s chief executive Tom Casey believes the technology will help utility companies better distribute electricity produced by renewable resources, such as solar panels or wind farms. " A smart grid’s system can be paired up with the renewable resources so that when the renewable source is varying, the overall load can be varied as well, " Casey told the House Select Committee on Energy Independence and Global Warming. " This will reduce or eliminate the need for backup coal or gas-based power generation plants. \

For smart-grid technology to work, which of the following is a must

A．The front yard of a house with a tall wooden pole.

B．A huge hook that can connect power lines together.

C．High-speed Internet access and Internet services.

D．Many monitors through which power flowing can be seen.
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