房地产经纪人执业资格注册有效期一般为( )年。A．1 B．2 C．3 D．5

“神舟”八号经过变轨后，最终在距离地球表面约343公里的圆轨道上正常飞行，约90分钟绕地球一圈．则下列说法错误的是 

A．“神舟”八号绕地球正常飞行时宇航员的加速度小于9.8m/s²

B．“神舟”八号绕地球正常飞行的速率可能大于8km/s

C．“神舟”八号飞船在轨道上正常飞行时，宇航员会处于完全失重状态而悬浮。

D．“神舟”八号运行的周期比地球近地卫星的周期大

关于文化差异下列说法错误的是（）

A．不同的国家、民族、人种具有不同的生活和工作模式

B．各种文化模式都有共同的价值体系和行为准则，与社会环境无关

C．文化差异一般的特点可以表现在服装、饮食和语言中

D．文化差异比较复杂的特点融化在人们的信仰、价值观、思维方式和言行举止中

赵某购买了一栋房屋，并对该房屋投保了财产险，不久，赵某将房屋卖给朱某，并办理了房屋过户手续，以下说法正确的是：( )

A．不必通知保险公司，保险合同继续有效

B．应通知保险公司，保险合同继续有效

C．应通知保险公司，保险公司同意继续承保的，保险合同继续有效

D．应通知保险公司，保险公司同意继续承保的，依法变更保险合同

超温对管道使用寿命有何影响？

With hundreds of millions of electronic (11)taking place daily, businesses and organizations have a p incentive to protect the. (12) of the data exchanged in this manner, and to positively ensure the (13) of those involved in the transactions. This has led to an industry-wide quest for better, more secure methods for controlling IT operations,and for deploying p security mechanisms deeply and broadly throughout networked infrastructures and client devices. One of the more successful concepts to engage the imaginations of the security community has been the development of standards-based security(14) that can be incorporated in the hardware design of client computers. The principle of encapsulating core security capabilities in (15) and integrating security provisions at the deepest levels of the machine operation has significant benefits for both users and those responsible for securing IT operations.

空白处（14）应选择（）

A.appliances

B.chips

C.tools

D.means