什么是钢的奥氏体本质晶粒度和钢的奥氏体实际晶粒度？

对于企业裁减人员的决定，工会依法可采取的行动是：

A．工会认为该决定不适当的，有权提出意见

B．工会认为该决定违反法律、法规或者劳动合同的，有权要求重新决定

C．被裁减人员提起诉讼的，工会应当依法给予支持和帮助

D．被裁减人员提起诉讼有困难的，工会可以代表职工提起诉讼

2m=______cm7kg=______g350cm=______dm2时=______分．

二级保护野生药材物种（）

A.黄芩

B.甘草

C.淫羊藿

D.羚羊角

根据《龙门架及井架物料提升机安全技术规范》（JGJ88-2010），当荷载达到额定起重量的（）时，起重量限制器应切断上升主电路电源。

A.100%

B.110%

C.115%

D.120%

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. \

What’s the passage mainly about（）

A. Computers and Internet bring utilities into digital age

B. A new technology is introduced into the nation’s electricity grids

C.The U. S. government will work with a private electricity company

D. Smart-grid technology will take the place of coal or gas based power plant