当关系模式R(A,B) 已属于3NF,下列说法中______是正确的。 A.它一定消

题型:单项选择题

问题:

当关系模式R(A,B) 已属于3NF,下列说法中______是正确的。

A.它一定消除了插入和删除异常

B.仍存在一定的插入和删除异常

C.一定属于BCNF

D.A和C都是

考点:计算机等级考试数据库技术三级数据库技术笔试37
题型:单项选择题

患者男性,39岁。确诊为寻常型银屑病12年,四肢多关节疼痛伴部分关节肿胀2个月。专科检查:束状发,躯干四肢散在斑疹、斑丘疹,伴银白色鳞屑。双侧肩关节、双侧髋关节压痛。腰椎多椎体间压痛。双侧腕关节和部分掌指关节肿胀畸形,伴压痛。部分指(趾)甲变形、变脆,甲下厚积鳞屑。

该患者的诊断为()。

A.风湿性关节炎

B.类风湿性关节炎

C.寻常型银屑病

D.强直性脊椎炎

E.关节病型银屑病

题型:单项选择题

足阳明胃经实证以母子配穴法应取()。

A.内庭

B.足三里

C.冲阳

D.解溪

E.厉兑

题型:单项选择题

阅读理解

     Even before my father left us,my mother had to go back to work to support our family.Once

I came out of the kitchen,complaining,"Mom,I can't peel potatoes.I have only one

hand."

     Mom never looked up from sewing."You get yourself into that kitchen and peel those

potatoes," she told me."And don't ever use that as an excuse for anything again!"

In the second grade,our teacher lined up my class on the playground and had each of us race

across the monkey bars,swinging from one high steel rod to the next.When it was my turn,

     I shook my head.Some kids behind me laughed,and I went home crying.

That night I told Mom about it.She hugged me,and I saw her "we'll see about that"

look.The next afternoon,she took me back to school.At the deserted playground,Mom

looked carefully at the bars.

    "Now,pull up with your right arm," she advised.She stood by as I struggled to lift myself

with my right hand until I could hook the bar with my other elbow.Day after day we

practiced,and she praised me for every rung I reached.I'll never forget the next time,

crossing the rungs,I looked down at the kids who were standing with their mouths open.

One night,after a dance at my new junior high,I lay in bed sobbing.I could hear Mom come

into my room."Mom," I said,weeping,"none of the boys would dance with me."

     For a long time,I didn't hear anything.Then she said,"Oh,honey,someday you'll be

beating those boys off with a bat." Her voice was faint and cracking.I peeked out from my

covers to see tears running down her cheeks.Then I knew how much she suffered on my

behalf.She had never let me see her tears.

1. Which of the following expressions can be used most suitably to describe Mom's attitude

when she made the child peel potatoes?

A. Cruel.  

B. Serious.  

C. Strict.  

D. Cold.

2. From the passage,we know monkey bars can help a child train________.

A. the skill to throw and catch things

B. the speed of one's hand movement

C. the strength and skill to hang and sway

D. the bodily skill to rotate round a bar

3. What does the sentence "I saw her 'we'll see about that' look" imply?

A. Mom believed every aim could be achieved if you stuck to it.

B. The race across monkey bars was not difficult enough for a child to give up.

C. Mom was determined to prove she herself was better than the teacher.

D. What the child had said brought Mom great attraction and curiosity.

4. When the child looked down at the kids,they were standing with their mouths open

because_____

A. they felt sorry for what they had done before

B. they were afraid the author might fall off and get hurt

C. they wanted to see what the author would do on the bars

D. they were astonished to find the author's progress

5. The most probable conclusion we can draw after reading the passage is________.

A. the last incident was sad enough to make Mom weep

B. the child's experience reminded Mom of that of her own

C. Mom could solve any problem except the one in the last paragraph

D. in fact Mom suffered more in the process of the child's growth

题型:单项选择题

下列关于GB2312-80汉字内码的说法正确的是

A.每个汉字内码的长度随其笔画的多少而变化

B.汉字的内码与它的区位码相同

C.汉字的内码一定无重码

D.使用内码便于打印

题型:单项选择题

以病人为本,以健康为本,确保生产、销售、使用的药品安全、有效、经济、合理是

A.执业药师的权力
B.执业药师的义务
C.执业药师执业行为规范
D.执业药师的责任
E.执业药师职业道德准则

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