认证(authentication)是防止_______攻击的重要技术。A．主动 B

检察官职业道德的主要规范包括：

A．严格执法，文明办案

B．守法遵纪，清正廉明

C．刚正不阿，护法为民

D．文明高效，热情服务

某公司2003年息税前利润为2000万元，所得税率为30%，折旧与摊销为100万元，流动资产增加500万元，无息流动负债增加150万元，长期资产增加800万元，无息长期债务增加200万元，利息40万元。假设该公司能够按照40%的固定资产负债率为投资筹集资本，企业保持稳定的财务结构不变，“净投资”和“债务净增加”存在固定比例关系，则股权自由现金流量为( )万元。

A．862

B．882

C．754

D．648

工程项目在建设过程中，发包人要求承包人提供的担保通常有（）。

A.施工投标保证

B.施工合同履约保证

C.施工合同支付保证

D.工程预付款保证

E.施工合同工程垫支保证

如果在一个课程注册系统中，定义了类CourseSchedule和类Course，并且在类CourseSchedule中定义了方法Add（c：Course）和方法Remove（c：Course），那么类CourseSchedule和类Course之间的是一种（）关系。

A.包含

B.实现

C.依赖

D.泛化

In most parts of the world, climate change is a worrying subject. Not so in California. At a recent gathering of green luminaries—in a film star’s house, naturally, for that is how seriousness is often established in Los Angeles—the dominant note was self-satisfaction at what the state has already achieved. And perhaps nobody is more complacent than Arnold Schwarzenegger. Unlike A1 Gore, a presidential candidate turned prophet of environmental doom, California’s governor sounds cheerful when talking about climate change. As well he might: it has made his political career.

Although California has long been an environmentally-conscious state, until recently greens were concerned above all with smog and redwood trees. "Coast of Dreams", Kevin Stag’s authoritative history of contemporary California, published in 2004, does not mention climate change. In that year, though, the newly-elected Mr. Schwarzenegger made his first tentative call for western states to seek alternatives to fossil fuels. Gradually he noticed that his efforts to tackle climate change met with less resistance, and more acclaim, than just about all his other policies. These days it can seem as though he works on nothing else.

Mr. Schwarzenegger’s transformation from screen warrior to eco-warrior was completed last year when he signed a bill imposing legally-enforceable limits on greenhouse—gas emissions—a first for America. Thanks mostly to its lack of coal and heavy industry, California is a relatively clean state. If it were a country it would be the world’s eighth-biggest economy, but only its 16th-biggest polluter. Its big problem is transport—meaning, mostly, cars and trucks, which account for more than 40% of its greenhouse-gas emissions compared with 32% in America as a whole. The state wants to ratchet down emissions limits on new vehicles, beginning in 2009. Mr. Schwarzenegger has also ordered that, by 2020, vehicle fuel must produce 10% less carbon: in the production as well as the burning, so a simple switch to corn-based ethanol is probably out.

Thanks in part to California’ s example, most of the western states have adopted climate action plans. When it comes to setting emission targets, the scene can resemble a posedown at a Mr. Olympia contest. Arizona’s climate-change scholars decided to set a target of cutting the state’s emissions to 2000 levels by 2020. But Janet Napolitano, the governor, was determined not to be out-muscled by California. She has declared that Arizona will try to return to 2000 emission levels by 2012.

California has not just inspired other states; it has created a vanguard that ought to be able to prod the federal government into per national standards than it would otherwise consider. But California is finding it easier to export its policies than to put them into practice at home. In one way, California’ s self-confidence is fully justified. It has done more than any other state—let alone the federal government—to fix America’s attention on climate change. It has also made it seem as though the problem can be solved. Which is why failure would be such bad news. At the moment California is a beacon to other states. If it fails, it will become an excuse for inaction.

According to the author, Mr. Arnold Schwarzenegger is cheerful chiefly because（）

A. climate change is not worrying California anymore

B. even film stars become serious about environmental protection

C. he has benefited personally from California’s achievements

D. his style of administration is always dominated by self-satisfaction