CT机房安装空调主要为了（） A.患者和工作人员舒服 B.不设窗户，使射线屏蔽更安全

某女性，64岁，既往高血压病病史15年，活动后心悸、气短3年，2小时前无明显诱因突发发生喘憋。体检：端坐体位，BP190/110mmHg，R30次/分，Bp108次/分，心界向左侧扩大，双肺可闻及广泛湿啰音。心电图示p波消失，代之以f波，不规律，QRS波群形态正常。该患者心律不齐的最可能诊断为（）

A.心房颤动

B.室性期前收缩

C.心室颤动

D.阵发性室上性心动过速

E.阵发性室性心动过速

阅读材料，回答下列问题。（11分）

材料一 世界两大著名三角洲图

材料二 上海与新奥尔良气候资料统计图

材料三 甲乙两区域所处的沿海地区风能资源丰富。随着经济的高速增长，甲区域建立了许多新能源产业基地，一大批与之相配套的政策、法规也相继出台，这对区域的可持续发展产生了重大影响。在美国，风力发电总产能占全球风力发电的五分之一，成为世界风力发电的首强。

（1）根据材料一简述河流在两座城市发展中的共同作用。（2分）

（2）根据材料二比较两城市的气候特征的异同点。（5分）

（3）根据材料三分析两地区在风能领域合作的社会经济条件。（4分）

某企业准备将3项工作A、B、C分配给甲、乙、丙三人，每人分别做一项。估计各人完成各项工作所需的天数如下表所示：为使完成这三项工作所需的总天数最少，应选最优的分配方案。在最优分配方案中，（）。

A．甲做工作A

B．甲做工作B

C．乙做工作A

D．乙做工作B

With U.S. companies sitting on an estimated $1.8 trillion in cash, it raises the question: Why aren’t they deploying more of their hoard to expand their businesses Or one might channel John Maynard Keynes to ask: Where have the "animal spirits" gone Although capital spending in the U.S. is up 12 percent since the lows of early 2009, it’s still running $88 billion below the peak of $1.34 trillion reached in the first quarter of 2008, says Joseph LaVorgna, chief U.S. economist at Deutsche Bank. He doesn’t expect capital spending to catch up to that peak level and officially start to expand until the second quarter of 2011. (LaVorgna’s definition of capital spending includes physical equipment and software, but not structures such as new stores or manufacturing plants. Spending on structures is about 2 percent of gross domestic product, one-third the size of capital sending’s contribution to GDP, he says.)

"The trend and momentum have definitely turned and it’s just a matter of time before you see other companies give way to capital spending, and eventually that will result in hiring," says LaVorgna. But with spending running $88 billion below peak, he says employment "should be farther along than it is." Companies that have built up a lot of cash are starting to take some chances such as expanding into new markets, which requires hiring new workers, says John Challenger, chief executive officer of Challenger, Gray & Christmas, an employment consulting firm. U.S. companies have announced the hiring of 118,209 new employees through August, according to data collected by the firm.

So who’s stepping up to the plate Some companies refuse to be cowed and are taking big, if calculated, chances, including ambitious capital projects, hiring new workers, and expanded investment in research and development, according to growth-oriented mutual fund managers contacted by Businessweek.com. If there’s a common denominator, it’s a perceived opportunity and confidence in sustainable demand, whether due to new trends in technology or to new markets that need certain products. Other names came from a list of the top-hiring U.S. companies through July 2010 compiled by Challenger, Gray & Christmas.

"We don’t spend capital unless we have a new contract to supply oxygen, nitrogen, or hydrogen to our customers," says James Sawyer, Praxair’s chief financial officer. "Those are 15-year contracts with minimal take-or-pay clauses written into them, which ensure we will get a good return on our capital investment, regardless of how the rest of the economy is doing."

Some younger outfits with entrepreneurial managers who have lived through a few business cycles think their companies may be able to steal a march on competitors more reluctant to spend, says Aram Green, manager of Clear Bridge Advisors Small Cap Growth Fund. "There’s clearly been a decision by management that ’This is not the time to take our foot off the accelerator. In fact, it’s time to push harder and further distance our product from the competition.’\

John Challenger suggests that（）

A. all companies are thinking of expanding capital spending

B. employment will lead to the increase of capital spending

C. some companies are ready to hire new workers for the new market

D. capital spending will put companies in a dangerous situation

进入施工现场严禁穿（）。

A、绝缘鞋

B、防滑鞋

C、高跟鞋

D、帆布鞋