2010年10月1日我国发射了“嫦娥二号”探月卫星.与嫦娥一号不同,嫦娥二号直接

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问题:

2010年10月1日我国发射了“嫦娥二号”探月卫星.与嫦娥一号不同,嫦娥二号直接被火箭从地面送入月球轨道,并在离月球表面100公里的轨道上做匀速圆周运动,如图所示.已知嫦娥二号绕月球的周期为T,万有引力常量为G,月球表面的重力加速度是地球重力加速度的

1
6
.下列说法中正确的是(  )

A.嫦娥二号在圆形轨道上运动时不需要火箭提供动力

B.根据题中条件可以算出嫦娥二号在圆形轨道上运动的线速度

C.根据题中条件可以算出月球质量

D.根据题中条件可以算出嫦娥二号受到月球引力的大小

考点:人造地球卫星万有引力定律的其他应用
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下列关于我国质量监管机制的说法,不正确的是()

A.已有质量监管制度需要不断完善和固化

B.质量监管机制需要创新

C.质量监管机制需要完善

D.质量监管机制已经取得了较为重大的进展

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引起爆炸、使人遭到电击、降低产品质量等是工艺过程中产生静电的危害。

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依据我国《刑法》,证券交易内幕信息的知情人员或者非法获取证券交易内幕信息的人员,在涉及证券的发行、交易或者其他对证券的价格有重大影响的信息尚未公开前,买入或者卖出该证券,或者泄露该信息,情节严重的,处五年以下有期徒刑或者拘役,并处或者单处违法所得()罚金。

A.一倍以上五倍以下

B.一倍以上十倍以下

C.二倍以上五倍以下

D.二倍以上十倍以下

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The California Public Employees’ Retirement System (CalPERS) has positioned itself as the premier champion of investor rights, regularly singling out bad managers at some of the nation’s largest companies in its annual corporate-governance focus lists. And with $153 billion under management, Wall Street tends to listen when CalPERS speaks out. But the country’s largest pension fund has never taken on as big a fish as it did Dec. 16, when it filed a class action against the New York Stock Exchange and seven of its member firms. CalPERS’ suit charges the NYSE and specialist firms with fraud, alleging that the exchange skirted its regulatory duties and allowed its members to trade stocks at the expense of investors.
The move is a major slap in the face for the NYSE’s recently appointed interim Chairman John Reed. The former Citibank chairman and CEO came on board in September after the exchange’s longtime head, Richard Grasso, resigned under pressure over public outrage about his excessive compensation.
Reed has been widely criticized by CalPERS and other institutional investors for not including representatives of investors on the exchange’s newly constituted board and not clearly separating the exchange’s regulatory function from its day-to-day operations. The CalPERS lawsuit is evidence that the investment communities’ dissatisfaction hasn’t ebbed. "Our hopes were dashed when Mr. Reed didn’t perform," says Harrigan.
The suit alleges that seven specialist firms profited by abusing and overusing a series of trading tactics. The tactics, which are not currently illegal, include "penny lumping’, where a firm positions itself between two orders to capture a piece of the price differential, "front running", which involves trading in advance of customers based on confidential information obtained by their orders, and "freezing" the firm’s order book so that the firm can make trades on its own account first.
Many of the suit’s allegations are based on a previously disclosed investigation of the exchange conducted by the Securities & Exchange Commission. According to the suit, the October SEC report found "serious deficiencies in the NYSE’s surveillance and investigative procedures, including a habit of ignoring repeat violations By specialist firms".
The suit highlights the growing frustration that institutional investors have expressed with what they perceive as a system that needs to be revamped--if not eliminated. According to California State Comptroller Steve Westley, a CalPERS board member who participated in the Dec. 16 press conference, he has repeatedly called on the NYSE to end its use of specialist firms to facilitate trades and move to a system of openly matching of buyers and sellers. BLIND EYE "There’s no reason not to move to a fully automated exchange," Westley says. "Every exchange in the world is using such a system. The time is now for the NYSE to move into the 21st century and remove the cloud that there’s self-dealing working against investors.\

Which of the following statements is Not true

A.Investors were not sufficiently represented on NYSE’s board.

B.The seven specialist firms made profits by illegal procedures.

C.CalPERS’ suit against the NYSE resulted largely from a SEC’s report.

D.NYSE had ignored the firms’ improper operations for a long tim

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施工中应确保现场型钢柱拼接和梁柱节点连接的焊接质量,其焊缝质量应满足()质量等级要求。

A.一级焊缝

B.二级焊缝

C.三级焊缝

D.四级焊缝

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