皮皮学,免费搜题
登录
搜题
【单选题】
1 Information is the primary commodity in more and more industries today. 2 By 2005, 83% of American management personnel will be knowledge workers. Europe and Japan are not far behind. 3 By 2005, half of all knowledge workers (22% of the labour force) will choose 'flextime, flexplace' arrangements, which allow them to work at home, communicating with the office via computer networks. 4 In the United States, the so-called 'digital divide' seems to be disappearing. In early 2000, a poll found, that, where half of white households owned computers, so did fully 43 of African American households, and their numbers were growing rapidly. Hispanic households continued to lag behind, but their rate of computer ownership was expanding as well. 5 Company-owned and industry-wide television networks are bringing programming to thousands of locations. Business TV is becoming big business. 6 Computer competence will approach 100% in US urban areas by the year 2005, with Europe and Japan not far behind. 7 80% of US homes will have computers in 2005, compared with roughly 50% now. 8 In the United States, 5 of the 10 fastest-growing careers between now and 2005 will be computer related. Demand for programmers and systems analysts will grow by 70%. The same trend is accelerating in Europe, Japan, and India. 9 By 2005, nearly all college texts and many high school and junior high books will be tied to Internet sites that provide source material, study exercises, and relevant news articles to aid in learning. Others will come with CD-ROMs that offer similar resources. 10 Internet links will provide access to the card catalogues of all the major libraries in the world by 2005. It will be possible to call up on a PC screen millions of volumes from distant libraries. Web sites enhance books by providing pictures, sound, film clips, and flexible indexing and search utilities. 11 Implications: Anyone with access to the Internet will be able to achieve the education needed to build a productive life in an increasingly high-tech world. Computer learning may even reduce the growing American prison population. 12 Knowledge workers are generally better paid than less-skilled workers. Their wealth is raising overall prosperity. 13 Even entry-level workers and those in formerly unskilled positions require a growing level of education. For a good career in almost any field, computer competence is a must. This is one major trend raising the level of education required for a productive role in today's work force. For many workers, the opportunity for training is becoming one of the most desirable benefits any job can offer. Information technology is expected to have impact on all the following EXCEPT
A.
American management personnel.
B.
European management personnel.
C.
American people's choice of career.
D.
traditional practice at work.
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【单选题】人的心理活动对一定对象的指向和集中是( )
A.
认知
B.
注意
C.
意志
D.
想象
【简答题】观察下列等式: ① 1- 1 2 = 1 1×2 ; ② 1 2 - 1 3 = 1 2×3 ; ③ 1 3 - 1 4 = 1 3×4 ; ④ 1 4 - 1 5 = 1 4×5 ; … (1)猜想并写出第n个算式:______; (2)请说明你写出的等式的正确性; (3)把上述n个算式的两边分别相加,会得到下面的求和公式吗?请写出具体的推导过程. 1 1×2 + 1 2×3 + 1 3×4 +...
【简答题】请先观察下列算式,再填空: ; ; ; ; ; ;… (1)先填空,再通过观察归纳,你知道上述规律的一般形式吗?请把你的猜想写出来. (2)你能运用所学的知识来说明你的猜想的正确性吗?
【简答题】(1)用计算器探究,下列各等式成立吗? ① ,② , ③ , ④ ; (2)请你写出一个能“约去”指数的等式; (3)猜想能“约去”指数的一般结论.
【单选题】下面是一个形态构造特别的高阶行列式。 | a 1 1 ... 1 1 | | 1 a 1 ... 1 1 | | ............ | | 1 1 ... 1 a 1 | | 1 1 ... 1 1 a | 一般,对这种构造规则的行列式的计算思路是:开始针对它们的低阶情形,进行简单的计算,然后逐步归纳出高阶情形下的结果。所谓归纳,本质还是在猜测,若要严格的证明,则需要用到数学归纳法。...
A.
用n阶行列式的定义做(用定义怎么下手?没处下手)
B.
利用行列式的性质做
C.
(存在其他方法,但没有讲到。)
【简答题】观察下列各式: (1)由此可推测 =____; (2)请你猜想出能表示(1)的特点的一般规律,用含字母m的等式表示出来,并说明理由(m表示整数); (3)请直接用(2)中的规律计算 的值。
【单选题】美国蒸馏金酒的酒瓶底部有( )字,这是美国蒸馏金酒的特殊标志。
A.
“美 ”
B.
" U ”
C.
“A”
D.
“D”
【简答题】下列各式 : 、 、 , (1)用具体数值验证上述等式是否成立,(验证其中一个)) (2)通过上述验证,猜一猜: ______ ,归纳得出: _______ (3)请应用上述性质计算:
【简答题】观察下列等式: ① ;② ;③ ;④ ;…… (1)猜想并写出第n个算式:________; (2)请说明你写出的等式的正确性。 (3)把上述个算式的两边分别相加,会得到下面的求和公式吗?请写出具体的推导过程。 ________。 (4)我们规定:分子是1,分母是的分数叫做单位分数。任意一个真分数都可以表示成不同的单位分数的和的形式,且有无数多种表示方法.根据上面得出的两个结论,请将真分数 ...
【单选题】关于生态学基本概念的表述,以下( )错误。
A.
生态学是研究有机体和它们的环境之间相互关系的科学
B.
生态学是研究生物之间、非生物之间相互关系的科学
C.
生态学是研究生物之间彼此关系以及生物与其周围的物理环境与生物环境间的相互关系的科学
D.
生态学是研究植物,动物相对于自然与生物环境关系的科学
相关题目: