在一些建筑工地、港口常见到各种大型起重机。下图所示是一种起重机的简图,为了保证起

题型:计算题

问题:

在一些建筑工地、港口常见到各种大型起重机。下图所示是一种起重机的简图,为了保证起重机起重时不会翻倒,在起重机右边配有一个重物m0,已知OA=10m,OB=5m,起重机功率为30kW,起重机本身重力不计。求:

(1)要使起重机吊起6×103kg的货物时不会绕支点O翻倒,右边配重m0至少为多少千克?

(2)若机械效率为80%,把5×103kg的货物沿竖直方向匀速提高15m,需要多少时间?  

考点:杠杆的平衡条件滑轮(组)的机械效率
题型:计算题

乙某拐骗17岁少女1人,欲卖至外省。在拐卖途中,乙某几次强行 * * 淫该女,并强迫其卖淫两次,则乙某的行为应当认定为:( )

A.构成拐卖妇女罪、强 * * 罪、强迫卖淫罪,应实行数罪并罚

B.构成拐卖妇女罪与强迫卖淫罪,此两罪应实行数罪并罚,其强 * * 行为不宜单独定罪,而应作为强迫卖淫罪中“强 * * 后迫使卖淫的”这一从重处罚的条件

C.只构成强 * * 罪、强迫卖淫罪,因为其拐卖行为尚未完全实现

D.只构成拐卖妇女罪,其强 * * 行为、强迫卖淫的行为只作为法定的从重处罚条件,不单独定罪

题型:计算题

句型转换

1. My favorite subject is P. E.(对画线部分提问)  

_________ _________ favorite subject?

2. He doesn't like math because it's very difficult.(对画线部分提问)  

__________ _________ he like math?

3. Miss Wang is his English teacher.(对画线部分提问)  

_________ _________ his English teacher?

4. His favorite subject is music.(改为同义句)  

He_________ music_________.

5. My brother likes Chinese.(改为否定句)

My brother  ________ _________Chinese.

6. He does his home work in the evening.(改为一般疑问句)    

_________ he _________ his homework in the evening?

题型:计算题

装置气密压力最终要达到()。

A、设计操作压力

B、安全阀定压

C、低于设计操作压力

D、设备实验压力

题型:计算题

The questions in this group are based on the content of a passage. After reading the passage, choose the best answer to each question. Answer all questions following the passage on the basis of what is stated or implied in the passage.

The collapse of the stock "bubble" of Internet-related companies in 2000-2001 has resulted in more than its fair share of analysis, hand-wringing, and finger-pointing. A panel discussion at a recent Technology Today conference in Santa Monica produced a heated debate between two former luminaries of the dot.corn world: investment banker Pat Verhofen and Sue Mickelson, founder and CEO of Internet retailer Frizbeez.com.

Verhofen fired the opening shot by placing blame for the collapse of Internet stocks on the shoulders of Internet entrepreneurs who aggressively promoted ideas without viable business models. These entrepreneurs were both irresponsible and deceptive, Verhofen argued, to take investors’ money to fund operations that could not reasonably turn a profit, such as giving computers away for free or selling bulky objects, such as dog food or furniture, over the Internet. Many of these companies, he suggested, were little more than arrangements of smoke and mirrors designed to separate investors from their money.

Mickelson responded that Verhofen was like a fox in a henhouse blaming the rooster for all the dead chickens. Entrepreneurs cannot be blamed, she argued, for trying to make money for themselves and other people, because that is what entrepreneurs do. She also stated that you cannot know what ideas will or will not work until you try them; contemporaries of the Wright brothers said that a heavier-than-air aircraft could never work, and look at the skies today.

Mickelson instead placed the blame on the unscrupulous bankers and fund managers who hyped Internet stocks in order to cash in on fees from IPOs and trades. In contrast to entrepreneurs, these financial types actually do have a responsibility to offer only sound financial advice to their clients. If anyone should bear the blame, she argued, it should be people like Pat Verhofen.

Indigo Smith, the moderator of the panel, responded that perhaps the true fault lay with the common investors, who should not have invested in technology stocks in the first place if they lacked the knowledge to do so properly. While she expressed sympathy for those elderly investors who lost substantial portions of their retirement savings on flimsy Internet stocks, she observed that no one forced them to invest in those stocks.

If Verhofen’s arguments and statements are all correct, which of the following statements can accurately be inferred ?()

A. Biotechnology executives who aggressively raise investment capital for bioengineered products with no conceivable market should be held responsible if biotechnology stocks crash.

B. Investors should make financial decisions only with the advice of qualified financial advisors, such as investment bankers or fund managers.

C. If people lose money on investments that they inadequately researched, they have only themselves to blame.

D. If insurance companies provide home insurance for homes built in a hurricane zone and those homes are subsequently all destroyed by a major hurricane, the insurance company should be blamed for any investment losses suffered by its shareholders.

E. The collapse of Internet stocks would not have occurred if companies had not attempted to sell bulky items, like dog food, over the Internet.

题型:计算题

塑料制鞋面的装金属护头的防水鞋

更多题库