患者症见头晕目眩，腰膝酸软，大便秘结，小便清长，舌质淡嫩，脉沉细者。治疗应首选A．济

下列表现属于气滞血阻积聚的是（）

A.积聚块软且不甚坚

B.积块固着不移

C.积块同时出现胀痛

D.舌苔厚腻

E.脉沉实

关于活动目录的描述中，正确的是( )。

A．活动目录是Windows 2000 Server的新功能

B．活动目录包括目录和目录数据库两部分

C．活动目录的管理单位是用户域

D．若干个域树形成一个用户域

从所给的四个选项中，选择最合适的一个填入问号处，使之呈现一定的规律性。（）

A.

B.

C.

D.

Fifteen percent of US teenagers aged 12 to 17 who own mobile phones have received nude（裸体）or nearly nude images of someone they know, according to a survey released on Tuesday.

Only four percent of mobile phone-owning   1 in that age group have sent sexually suggestive pictures of themselves, a practice known as "sexting,"   2 the Pew Research Center’s Internet & American Life Project.

The Pew survey found that girls and boys were equally as likely to have sent a suggestive picture to   3 person and 4  teenagers were more likely to have engaged in "sexting."

Eight percent of 17-year-olds with mobile phones have sent a sexually provocative（刺激的） image  5  texting and 30 percent have 6   a nude or nearly nude image on their phone.

Only four percent of 12-year-olds have sent suggestive images of   7 .

Amanda Lenhart, a senior research specialist at Pew and the author of the report, said sexually suggestive images have become a   8  of "relationship currency" for teens.

"These images are    9  as a part of or instead of sexual activity, or as a way of starting or  10  a relationship with a significant other," she said. "And they are also passed 11  to friends for their entertainment value, as a joke or for   12 ."

"The desire for risk-taking and sexual exploration during the teenage years  13  with a constant connection via mobile devices creates a 'perfect storm' for sexting," said Lenhart.

"Teenagers have always grappled with issues around sex and   14  , but their coming-of-age mistakes transgressions have never been so easily   15  and stored for others to see," she added.

The survey found that teens with unlimited text messaging plans were more likely to receive "sexts"   16  images of people they know. About 75 percent of mobile phone owning teens have unlimited plans.

Among this group, Pew said 18 percent reporting receiving "sexts"    17   with eight percent of teens on    18  data plans and three percent of teens who pay per message.

According to Pew, 58 percent of 12-year-olds own a mobile phone and 83 percent teens aged 17   19   .

Pew noted that a number of US states are grappling with how to 20  "sexting" among minors and some legislatures(立法机关) have stepped in to consider laws that would downgrade charges from felonies（重罪） to misdemeanors（轻罪）.

Pew conducted telephone interviews with 800 teens aged 12 to 17 and their parents between June 26 and September 24.

(   ) 1. A. teens                  B. adults               C. students            D. parents

(   ) 2. A. referring to               B. reporting          C. saying              D. according to

(   ) 3. A. other                 B. another             C. others               D. the other

(   ) 4. A. younger             B. fewer                      C. older                D. more

(   ) 5. A. by                     B. in                    C. on                    D. through

(   ) 6. A. accepted             B. received           C. sent                  D. mailed

(   ) 7. A. others                B. themselves        C. himself             D. herself

(   ) 8. A. habit                  B. system              C. method             D. form

(   ) 9. A. shared                B. limited             C. tasted                      D. controlled

(   ) 10. A. remaining         B. gaining             C. maintaining      D. obtain

(   ) 11. A. along                      B. by                    C. as                    D. for

(   ) 12. A. joy                  B. fun                  C. excitement        D. delight

(   ) 13. A. compared         B. followed           C. combined         D. went

(   ) 14. A. friendships       B. scholarships      C. relatives           D. relationships

(   ) 15. A. transmitted       B. transformed      C. formed             D. switched

(   ) 16. A. containing               B. concluding        C. including          D. concerning

(   ) 17. A. comparing               B. compared         C. connected         D. joined

(   ) 18. A. limited             B. unlimited          C. few                  D. little

(   ) 19. A. have                B. same                C. do                    D. too

(   ) 20. A. do with            B. deal with          C. remove             D. ban

工艺过程排放是造成石化行业污染的主要途径。