下列关于关系运算的叙述中正确的是A.投影、选择、连接是从二维表的行的方向来进行运算

题型:单项选择题

问题:

下列关于关系运算的叙述中正确的是

A.投影、选择、连接是从二维表的行的方向来进行运算

B.并、交、差是从二维表的列的方向来进行运算

C.投影、选择、连接是从二维表的列的方向来进行运算

D.以上三种说法都不对

考点:计算机等级考试C++二级C++笔试375
题型:单项选择题

青年时代的生涯,注定是烦闷的。无论是动,是静,是欢乐,是无聊,总觉得背后有烦闷跟着。到底为什么是月儿晶莹,是雨儿阴沉,是一望的远山无际,是半池的微波粼粼这也只是一刹那顷的自然现象。是神妙,是温柔,对于人生有什么烦闷的影响“我不入地狱,谁人地狱”“不丧掉生命的,不能得着生命。”以众生的痛苦为痛苦,所以释迦牟尼、耶稣基督,他们奋斗的生涯里,注定的是永远烦闷! 下列陈述,不符合本段意思及情感的是( )。

A.作者说“青年时代的生涯,注定是烦闷的”,虽然没有明说“注定”的理由,但却体现了她对这一人生现象所具有的极其敏感的把握,同时也蕴含着她相当的文学修养

B.作者试图寻找青年烦闷心理的形成原因,“月儿”,“雨儿”、“远山”、“微波”等等正是作者从大自然的角度作了十分形象的解释,所谓“望月兴叹”、“听雨起愁”说的也是这个道理

C.作者引释迦牟尼、耶稣基督的名句,虽然并不表示有多么浓厚的宗教感情,但对他们作为奋斗者的烦闷,她是给子了充分肯定的

D.作品的主旨是探求情中之理,而行文曼妙舒展,形象错落有致,在很短小的篇幅中包蕴了相当丰富的内容,显得举重若轻,游刃有余

题型:单项选择题
It was late in the afternoon. Several hundred villagers left their houses and gathered in the open air outside the village. They were staring __ __ at the mountain top in the distance. It was covered with __ __ —beautiful and dangerous. 
The huge mountain is called Matterhorn. Mountain climbers had __ __ the top, using the southern route. But no one had __ __ dared to try a winter climbing up the northern side. But now one man was daring to try the __ __ route— the northern route, which was more difficult.  He was Walter Bonatti, a great mountain climber from Italy.
For two days he had climbed. The village people had watched him __ __. Now they were waiting to see his ____. If he planned to __ __ the next day, he would light a green signal. A red light would mean that he was __ __. 
A tiny green light __ __ high on the mountain side. Bonatti was not giving up! The people __ __. 
The next day he continued his way upward. He was so lonely and so __ __!But he would not give up. Again that night he lit the __ __ light.  
In the morning, Bonatti __ __. He could not see the top, but he knew he was __ __ there. Though the climb was painful, he moved up. 
Bonatti had spent months __ __ for the climb. Was the training enough? Did he have the strength and ____ to climb to the top? 
He was finally at the top! News about his __ __ was radioed to the world. 
The trip __ __ the southern route was easy. He was warmly welcomed in the village. He had done the “ __ __ ”,and would be well remembered as a climber of all time.
小题1:
A.backB.forwardC.downD.up
小题2:
A.flowersB.ice and snowC.green treesD.leaves
小题3:
A.watchedB.passedC.reachedD.climbed
小题4:
A.evenB.neverC.seldomD.ever
小题5:
A.differentB.uniqueC.sameD.easy
小题6:
A.patientlyB.carefullyC.anxiouslyD.eagerly
小题7:
A.faceB.figureC.flagD.signal
小题8:
A.slideB.continueC.restD.stop
小题9:
A.turning backB.moving upC.staying awayD.keeping on
小题10:
A.existedB.appearedC.turnedD.traveled
小题11:
A.cheeredB.laughedC.whisperedD.sighed
小题12:
A.determinedB.excitedC.tiredD.happy
小题13:
A.yellowB.blueC.greenD.red
小题14:
A.woke upB.turned upC.got upD.looked up
小题15:
A.alreadyB.almostC.hardlyD.surely
小题16:
A.trainingB.applyingC.planningD.asking
小题17:
A.ideaB.skillC.money D.wish
小题18:
A.victoryB.returnC.climbD.courage
小题19:
A.aheadB.upC.downD.to
小题20:
A.necessaryB.importantC.attractiveD.impossible
题型:单项选择题

毛制针织或钩编男长裤

题型:单项选择题

两种NSAID可联合用药以增加疗效。()

题型:单项选择题

拇指腕掌关节内收外展活动度测量错误的是()。

A.受检体位为坐位腕中立位

B.轴心在腕掌关节

C.固定臂与中指平行

D.移动臂与拇指平行

E.正常活动度为0°~60°

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