下列有关物质性质的比较正确的是( ) A.同主族元素的单质从上到下,非金属性减弱

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问题:

下列有关物质性质的比较正确的是(  )

A.同主族元素的单质从上到下,非金属性减弱,熔点增高

B.主族元素正化合价数,等于它的族序数

C.元素的非金属性越强,它的气态氢化物水溶液的酸性越强

D.酸性:HClO4>H2SO4>H3PO4>H2SiO3

考点:元素周期表
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在如图所示电路中,提供电能的装置是____________;要使这个电路中产生电流,还必须____________________。

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It is the job hunting season again. The job fairs(交易会) flood with hundreds and thousands of 2011 graduate students. Owing ___小题1:__ the global financial crisis, most graduate students admit that job hunting isn’t that easy any longer.

It is always a __小题2:___ (pain) process for college students to find jobs. With many colleges enlarged in recent years, large numbers of graduates need to hunt for jobs; ___小题3:___, job positions are quite limited. In order to get a job, the candidates should be more ___小题4:___ (competition) than ever before.

A Chinese expert predicted the job hunting pressure in China, with a rocketing increase in the active labor force, ___小题5:___ (reach) its climax in 2009. Yet, this situation continues in 2011. The Chinese government has provided financial support to encourage the college students to start ___小题6:__ own career.

To go on with further education or to find ___小题7:___ job is the hardest decision for the graduate students __小题8:___ (make) now. “I was preparing for my postgraduate exam ___小题9:___ I received my offer from a Japanese company. I was so excited ___小题10:___ I decided to quit the exam next year.” LiNing, a senior from school of mechanical science and technology in Huazhong University of Science and Technology said.

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患者腹痛,腹胀5个月,不能进食。查体:上腹部膨隆,压痛。腹部CT:上腹部囊状包块,考虑胰腺周围假性囊肿形成。诊断:重症胰腺炎伴假性囊肿形成。

当肠内营养液达到多少以后可以停止肠外营养()

A.50ml/h,24小时总量大于1000ml

B.100ml/h,24小时总量大于1500ml

C.100ml/h,24小时总量大于2000ml

D.150ml/h,24小时总量大于2500ml

E.150ml/h,24小时总量大于3000ml

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患者男,30岁。脐周阵发性绞痛伴恶心、呕吐2天。吐出胃内容物后症状可获短暂缓解,但很快腹痛复发。1天来症状加重伴停止排便排气。10年前曾行阑尾切除术,最可能的诊断为()。

A.急性胃炎

B.急性肠炎

C.急胰腺炎

D.粘连性肠梗阻

E.溃疡病急性发作

题型:选择题

根据《石油天然气管道保护法》的规定,管道企业应当自管道竣工验收合格之日起六十日内,将竣工测量图报管道所在地县级以上地方人民政府主管管道保护工作的部门备案。

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