问题 判断题

液体的粘性是引起液流水头损失的根源。

答案

参考答案:对

单项选择题

根据以下资料。回答111-115题。

2007年,黑龙江省大中型企业共481家,比上年增加27家;从业人员110.2万人,比上年增加3.1万人,完成工业总产值5143亿元,增长9.8%;增加值2546.1亿元,增长9.1%;实现主营业务收入5541亿,增长10.1%;实现利税总额1648.5亿元,增长0.9%;科技活动经费内部支出61.2亿元,增长23.7%。2007年全省大中型工业企业从事技术开发活动的人员6.5万人,比上年增加近0.4万人。其中科学家和工程师4.1万人,比上年增加0.2万人。从性别看,女性科技活动人员1.6万人,比上年增加0.3万人。从事科技活动全时人员为3万人,比上年增加0.3万人。2007年全省大中型工业企业加大新产品开发投入,积极研制开发新产品。全年经费投入10万元(含10万元)以上的新产品项目数1139项,与上年持平。用于新产品开发经费24.8亿元,比上年增长41.6%。平均每个新产品项目经费由上年的218.3万元上升到今年的286.4万元。投入增长带来了效益的增加。实现新产品产值429.6亿元,比上年增长36.6%。新产品销售收入437亿元,比上年增长44.3%。新产品出口18.5亿元比上年增长26.8%。申请专利851件,比上年增长16.4%,

下面说法中正确的是:

A.与上年相比,2007年黑龙江大中型企业平均每个新产品项目经费增长23.8%

B.2006年,黑龙江大中型企业实现新产品产值314.5亿元

C.2006年,黑龙江大中型企业科技活动经费内部支出62.1亿元

D.2006年,黑龙江大中型企业实现利税总额为1669.5亿元

单项选择题

Journalists who write about families as well as social and cultural issues can count on receiving an annual barrage of public relations pitches for Valentine’s Day. The PR blitz begins right after Christmas and continues almost until the big day itself. Daily, sometimes hourly, e-mails pop up on my computer screen, as publicity agents propose stories on a variety of love-rated subjects.
Some suggest traditional topics: How about interviewing the author of a new book on how to find the perfect mate Or what about a story offering ideas on the best gifts to give to your heartthrob Other suggestions take a thoroughly modern approach to romance. Publicists would be happy to provide information about the newest matchmaking website or the hottest dating coach. There’s even a "psychic medium" who promises to tell radio and television audiences about their "current and future relationships".
Individually, these story promotions could be taken for what they are: just another day, another client, another dollar in the life of publicity agents. But collectively, they signal more than simply a desire to capitalize on a holiday that has mushroomed into a $17 billion industry. In their varied forms, these promotions reflect the urgency of the quest for love and companionship in a society where one-quarter of all households now consist of single people.
These pitches also serve as a measure of how much Valentine’s Day itself has changed. They can impel long-married observers to look back with a certain nostalgia to a time several decades ago when Feb. 14 didn’t carry such intensity--and when courtship didn’t cost quite so much. That was a time before men were expected to spend two months’ worth of their salary for an engagement ring, before men and women decided they would settle for nothing less than a "soul mate", and before it was necessary to seek advice from an army of self-help gurus bearing titles such as "relationship and interpersonal communication expert". That was also an era when many hopeful Prince Charmings could show their love with a card or a heart-shaped box of drugstore chocolates, and when even a single rose could melt a young woman’s heart.
What a contrast to today, when anything less than a dozen long-stemmed roses can risk making a sender appear frugal, and when an ardent suitor who wants to make an impression will buy chocolates from Belgium, whatever the cost. This year the average man will spend $120 and the average woman $ 85, according to the National Retail Federation (NRF).
Is this love, or obligation For some men, it might even include a bit of guilt. As Tracy Mullin, CEO of the NRF, notes, presumably with tongue planted firmly in cheek, some men "may be looking at Valentine’s Day as a way to make up for that HDTV they splurged on for the Super Bowl." As one public radio station announcer put it during a Valentine’s Day fundraiser offering long-stemmed roses. "This is a perfect way to fulfill your Valentine’s obligations." Another host making a similar appeal urged listeners to "take care of your Valentine’s Day duties."
And if you don’t One relationship expert quoted in a Valentine’s Day press release offers the stern warning that "if a guy doesn’t come through on Valentine’s Day, it means he doesn’t care about you," so just say goodbye and move on. But assuming he does care, another PR firm suggests a high-tech approach to the day. "This year, think outside the box and send a Video Valentine!" the e-mail pitch begins. "Too shy to say those three little words in person Profess your love on video! Or use your cellphone to record yourself shopping for the perfect gift. " Diamonds, anyone
Whatever the approach, couples might do well to follow the advice of a group of husbands in Japan who say they know the answer to wedded bliss. In an effort to communicate better with their wives, they offer Three Principles of Love. Say "sorry" without fear, say "thank you" without hesitation, and say "I love you" without shame. It’s a trio of sentiments that women could adopt as well.
Tomorrow all the unsold Valentines with their declarations of love and affection will disappear from card racks, to be replaced by Easter messages featuring eggs and bunnies. Long stemmed roses will begin to open, boxes of chocolate will be nibbled away, and cards with sentimental messages will be propped on desks and dressers. Whatever hopes and expectations are fulfilled--or not--today, the celebration offers a touching reminder that when it comes to matters of the heart, the approaches might change, but the yearning for love and companionship doesn’t. Above all, it offers this comforting reassurance. Cupid lives.

When the author is asking "Is this love, or obligation "(para. 6), he is implying that ______.

A.obligation could be taken as equal to love

B.the changing pattern will not be popular

C.love cannot be replaced by obligation

D.the changing attitude is not healthy