阳光公司2008年12月31日资产负债表中“未分配利润”项目的年初余额为1000万元

下列各组元素属于p区的是 [ ]

A．原子序数为1、2、7的元素

B．O、S、P

C．Fe、Ar、Cl

D．Na、Li、Mg

When the system upon which a transport entity is running fails and subsequently reatarts, the ______ information of all active connections is lost. The affected connections become half-open, as the side that did not fail does not yet realize the promble.
The still active side of a half-open connections using a ______ timer. This timermeasures the time transport machine will continue to await an ______ of a transmitted segment after the segment has been retransmitted the maximum number of times. When the timer ______, the transport entity assumes that either the other transport entity or the intervening network has failed. As a result, the timer closes the connection, and signals an abnormal close to the TS user.
In the event that a transport entity fails and quickly restart, half-open connections can be teminated more quickly by the use of the RST segment. The failed side returns an RST_i to every segment i that it receives. When the RST_i reaches the other side, it must be checked for validity dased on the ______ number i, as the RST could be in response to an old segment .If the reset is valid, the transport entity performs an abnormal termination.

A. abandon B. give-up C. quit D. connection

半殖民地半封建社会，哪个阶级是带有两面性的阶级（）。

A.大资产阶级

B.民族资产阶级

C.城市小资产阶级

D.地主阶级

简述果汁澄清常用的方法及原理。

词作家晓光是发表诗歌近千首的音乐家，2001年任我国文化部副部长，中国文联副 * * ，他的歌曲作品《在希望的田野上》、（）被选入了联合国教科文组织亚太地区音乐教材。

A.《梁祝》

B.《我们走在大路上》

C.《那就是我》

D.《星星之火》