已知向量a=(-3,1),b=(1,-2),若a⊥(a+kb),则实数k=___

题型:填空题

问题:

已知向量
a
=(-3,1),
b
=(1,-2),若
a
⊥(
a
+k
b
),则实数k=______.
考点:用坐标表示向量的数量积
题型:填空题

There are stations where runners can get water at ________ throughout the marathon.[ ]

A. gaps  

B. intervals

C. random  

D. distance

题型:填空题

阅读下面的文字,完成1~3题。

门楣字匾的印记

  住在楼房里,出出进进总觉得少了些什么。想来想去,那昔日萦绕眼前的门楣上的字匾不见了。门楣上的字匾,蕴藏着深厚的民俗文化,记录着农村变迁。不管哪一家盖房,都要在大门的上方,用楷书、隶书、宋体或书法名人的狂草,在一米见长、近半米宽的砖磨、石雕上刻字,大多刻四个字。大凡来人登门,都要举目瞻望、默念,别出心裁的字匾,便引来一番赞叹和好评。门楣的字匾从有院落时就一直沿袭下来,它有农家的热望,有农家的期盼,也有农家的鸿鹄之志。我对门楣上的字匾没有过多的考察研究。我想,除“耕读人家”“紫气东来”“天道酬勤”等字匾是几百年来沿袭下来的外,有许多为应景之作,是针对当时的社会环境、人文教育、宣传理念而设定的。

  建于上世纪五十年代到六十年代中期的房屋,多为土坯房屋,房屋四角用砖砌而成,门窗砌上砖,四周用土坯垒起,住房是简陋了些,但作为门面的门楼,不能含糊,用砖砌起,叫做砖包疙瘩,在当时是富有和气派的象征。门楣上的字匾用砖磨刻写,多为“自力更生”“艰苦奋斗”“勤俭持家”“爱社如家”等。那时农民家里、心里就像是一张纸,没有家底,也没有私念,一心想着集体、国家。只要能为集体、国家多作贡献,再苦再累心也甜。那些字匾是发自他们内心的情感。从旧社会走过来的人,有了土地、吃穿,过上了安稳日子,怎能不知恩图报呢!

   * * 时期的住房,与五六十年代没有什么变化,但门楣上的字匾却发生了翻天覆地的变化,新盖的房屋门楣字匾写上了“斗私批修”“大公无私”“红心向阳”“兴无灭资”等字样,用红漆漆着,显得醒目而刺眼。它好像在默默关注着 * * ,这些语言硬邦邦,像一根根棍子戳到人身上。那时,那些“耕读之家”“光宗耀祖”“书香门第”被铲掉,留下疤痕。这是一种印记,它在土尘的散落中,记录着流年岁月。

  上世纪八九十年代,改革春风吹遍祖国大地,处处显示出勃勃生机。农村一改昔日的破败,展现了新模样。破旧的土坯房不见了,整齐的村道两旁,屹立着两层楼。青砖绿瓦的门楼,高大而气派,门楣上的字匾多姿多态,有青石雕刻而成的字匾,有大理石磨制而成的字匾,有镶着龙凤的烤瓷字匾。其内容也百花齐放,“日耀华门”“耕读务本”“龙凤呈祥”“清昂寰宇”“勤俭廉明”,既有高远的志向,又有幽香的韵律,耐人寻味。这些门楣字匾反映了农民走进新时代、当家做主人的气概,丰衣足食、生活安定的天伦之乐,成了农村一道靓丽的风景线。

  如今,一幢幢高楼拔地而起,城镇化的建设,形成包围农村之势。也许在一些农村,民居将由楼房代替,门楣上的字匾渐渐消逝,欣赏字匾的雅趣也随之消失了。流年的陈迹远去了,字匾里的故事失传了,但是中华文化传统的字匾,会永远刻在我们的记忆里。 (2011年4月《光明日报》,略有改动)

1.下列关于农村的“门楣字匾”的表述,不正确的一项是(     )

A.门楣字匾记录着农村的变化历程,蕴藏着深厚的民俗文化内涵。

B.门楣字匾从有院落时就一直沿袭,皆为四字,以表达农家的愿望。

C.门楣字匾,有许多应景之作,内容和社会环境、人文教育等有关。

D.门楣字匾多姿多态,制作材料不同,字体不同,大小则大致相同。

2.下列对原文内容的理解和分析,符合原文意思的一项是(     )

A.门楣字匾代表着农家对美好生活的期盼,所以许多人家都尽量把字匾写得别出心裁,以求登门之人的赞叹和好评。

B.门楼和门楣字匾往往是富有和气派的象征,因此不管住房如何简陋,在门楼和门楣字匾的用料上都绝不能含糊。

C.门楣字匾的内容随时代而变,像“爱社如家”、“兴无灭资”等,虽语言生硬,但都表现了农民知恩图报的心态。

D.门楣字匾的内容大多既体现高远志向,又有幽香的韵律,既有雅趣,又反映现实生活,成了农村一道靓丽的风景线。

3.根据原文内容,下列推断不正确的一项是(     )

A.门楣字匾用楷书、隶书、宋体或书法名人的狂草镌刻,选择何种字体,反映了主人的兴趣爱好。

B.门楣字匾和时代联系紧密,而有些不一定就是人们真实愿望的反映,如 * * 时期某些门楣字匾。

C.随着农村城镇化建设的推进,民居被楼房代替,门楣字匾将随之消逝,门楣字匾文化也将消失。

D.改革春风吹遍祖国大地,门楣字匾内容也百花齐放,丰富多彩,显示了人们的思想越来越多多元。

题型:填空题

下图是我国福建、浙江、上海和山东四省复种指数变化过程(复种指数=全年播种总面积/耕地面积×100%)。读下图完成下列问题。

(1)山东与浙江复种指数的差异,体现的地理分布规律主要是:

A.从赤道向两极的地域分异规律       B.从沿海向内陆的地域分异规律

C.没有明显的地理分布规律           D.垂直地域分异规律

(2)改革开放后,上海的复种指数明显变化的主要原因是:

A.农业技术水平的下降               B.农业结构的调整

C.交通运输条件的改善               D.全球气候变暖

题型:填空题

胫腓骨中段1/3骨折患者,复位后,用长腿石膏固定,4个月后骨折愈合拆除石膏,发现膝关节功能发生障碍,可能原因是

A.肌肉萎缩

B.关节僵硬

C.关节强硬

D.骨折复位不理想

E.骨折畸形愈合

题型:填空题

Effective communication is essential for all organisations. It links the activities of the various parts of the organisation and ensures that everyone is working towards a Common goal. It is also extremely important for motivating employees. Staff need to know how they are getting on, what they are doing right and in which areas they could improve. Working alone can be extremely difficult and it is much easier if someone takes an interest and provides support. Employees need to understand why their job is important and how it contributes to the overall success of the firm. Personal communication should also include target setting. People usually respond well to goals, provided these are agreed between the manager and subordinate and not imposed.

However, firms often have communications problems that can undermine their performance. In many cases, these problems occur because messages are passed on in an inappropriate way. There are of course, several ways of conveying information to others in the organisation. These include speaking to them directly, e-mailing, telephoning or sending a memo. The most appropriate method depends on what exactly it is you are communicating. For example, anything that is particularly sensitive or confidential, such as an employee’s appraisal, should be done face-to-face.

One of the main problems for senior executives is that they do not have the time or resources needed to communicate effectively. In large companies, for example, it is impossible for senior managers to meet and discuss progress with each employee individually. Obviously this task can be delegated but at the cost of creating a gap between senior management and staff. As a result, managers are often forced to use other methods of communication. Like memos or notes, even if they know these are not necessarily the most suitable means of passing on messages.

The use of technology, such as e-mail, mobile phones and network system, is speeding up communication immensely. However, this does not mean that more investment in technology automatically proves beneficial, systems can become outdated or employees may lack appropriate training. There are many communications tools now available but a firm cannot afford all of them. Even if it could, it does not actually need them all. The potential gains must be weighed up against the costs, and firms should realise that more communication does not necessarily mean better communication.

As the number of people involved in an organisation increase, the use of written communication rises even faster. Instead of a quick conversation to sort something out numerous messages can be passed backwards and forwards. This can lead to a tremendous amount of paperwork and is often less effective than face to face communication. When you are actually talking to someone you can discuss things until you are happy they have understood and feedback is immediate. With written messages, however, you are never quite sure how it will be received. What you think you have said and what the other person thinks you have said can be very different.

The amount of written information generated in large organisations today can lead to communication overload. So much information is gathered that it gets in the-way of making decisions. Take a look at the average manager’s desk and you will see the problem—it is often covered in letters, reports and memos. This overload can lead to inefficiencies. For example, managers may not be able to find the information they want when they need it. Communication is also becoming more difficult with the changes occurring in employment patterns. With more people working part-time and working from home, managing communication is becoming increasingly complex.

According to the article, what is the effect of receiving large amounts of written information()

A.It is counter-productive

B.It causes conflict in a company

C.It leads to changes in work patterns

D.It makes the main points more difficult to identify

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