已知函数f(x)=log22-xx-1的定义域为集合A，关于x的不等式2a＜2-

如图是两等量异种点电荷，以两电荷连线的中点O为圆心画出半圆，在半圆上有a、b、c三个点，b点在两电荷连线的垂直平分线上，下列说法正确的是(    )

A．ac两点的电场强度相同

B．ac两点的电势相同

C．正电荷在a点的电势能大于在b点的电势能

D．将正电荷由O移到b电场力做正功

Part 1

·Read the article below and choose the best sentence from the list on the next page to fill each of the gaps.
·For each gap (1-8) mark one letter (A-H) on the Answer Sheet.
·Do not mark any letter twice.

Ways to Save

"But I can’t save any money." It’s an excuse I hear a lot. Sometimes it’s a whine. (1) . In the past few years, it has become increasingly frequent, as more and more of us Americans make less than we spend, eating up the equity in our homes, borrowing from banks. The national savings rate is declining. (2) .
The question is: Why Why don’t Americans make saving a priority We certainly know that saving money—like eating broccoli and strengthening our core muscles—is good for us. (3) . Yoga has never been hotter. And broccoli now comes as a baby vegetable, precut and bagged, and even in purple. (4) There are three reasons for this.
One: Saving today is harder. "We’ve had an income transfer away from the middle class," says Anthony Pratkanis, a psychology professor at the University of California Santa Cruz, who specializes in financial issues. The typical household income has held largely steady around the mid-S40,000 range for a good half decade, he points out, while prices have continued to rise. (5) .
Two: Credit became too accessible. (6) . While banks at one time would not let you spend more than 36 percent of your total income on debt (including mortgage) they stretched that number to 55 percent during the housing boom: Why save when yot could get that big flat-screen TV today—just like the one the neighbors installed—and pay for it with mortgage debt that was both cheap and deductible
Three—and most intriguing: Saving is, was, and always will be no fun. "Saving money," explains Jason Zweig, author of Your Money and Your Brain, "doesn’t feel good." Think about it this way: (7) . "You can buy a pair of shoes today," says Zweig, "or have a nice retirement 20 years from now." (8) . You’re going to buy the shoes or head to the restaurant because the pleasure of getting something good today is much greater than the pleasure of getting something good years in the future—even if the reward in the future is bigger.

• A. You can go out to dinner now or put the money into an emergency fund in case the car’s transmission goes out—someday.
• B. For years it was simply too easy to get your hands on money to spend.
• C. In the latter cases, we listen.
• D. Choosing to save almost always means opting for delayed gratification instead of immediate gratification.
• E. Yet saving for tomorrow is still a largely ignored and unappreciated skill.
• F. Other times I detect a note of defiance.
• G. "If you’re having to spend a disproportionate amount of income on food and gas, it’s hard to save."
• H. And the situation seems to be getting wors

胃癌“三早”是指()

A．早期预防

B．早期诊断

C．早期发现

D．早期治疗

E．早期手术

张三在大明房地产开发公司开发的"亚洲之光"楼盘售楼处，经销售人员王五的多次推荐，2003年5月与大明房地产公司签订了商品房买卖合同，约定2003年9月交房，后来该房迟迟不能交付。后在张三紧催之下，王五不得不告诉张三，该楼盘已经被开发商抵押给银行了，张三气愤之下，于2004年8月向人民法院提起诉讼，要求解除合同，赔偿损失。后经查明，王五系该开发公司董事长。 如果你是张三的代理律师，请根据上述案情，为张三代拟一份民事起诉状。

我国的国内航线以（）的三角地带最为密集。

A、深圳

B、、北京

C、广州

D、上海