原始数据都加(或减)一个不等于零的常数后,则A.R变化B.S不变C.R、S都改变D.

题型:单项选择题

问题:

原始数据都加(或减)一个不等于零的常数后,则

A.R变化
B.S不变
C.R、S都改变
D.R、S、CV都改变
E.R、S、CV都不变

考点:公卫执业助理医师公卫执业助理医师
题型:单项选择题

咽喉淡红漫肿者,属()。

A.肺胃热盛

B.阴虚火旺

C.痰湿凝聚

D.肾水亏少

E.肺胃热毒

题型:单项选择题

右图所示图形符号表示单向()。

A.定量液压泵

B.变量液压泵

C.定量液压马达

D.变量液压马达

题型:单项选择题

The computer keyboard helped kill shorthand---a system of rapid handwriting, and now it's threatening to finish off handwriting as a whole. When handwritten essays were introduced on the SAT exams for the class of 2011, just 15% of the most 1.5 million students wrote their answers in cursive (草写字母).The rest? Block letters.

And those college hopefuls are just the first edge of a wave of US students who no longer get much handwriting instructions in the primary grades, frequently 10 minutes a day or less. As a result, more and more students struggle to read and write cursive.

At Keene Mill Elementary School in Springfield, all their poems and stories are typed. Children in Fairfax County schools are taught keyboarding beginning in kindergarten. Older students who never mastered handwriting say it doesn't affect their grades.

There are those who say the culture is at a crossing, turning from the written word to the typed one. If handwriting becomes a lost form of communication, does it matter?

It was at University of Virginia that researchers recently discovered a previously unknown poem by Robert, written in his unique script. Handwritten documents are more valuable to researchers, historians say, because their authenticity (真实性)can be confirmed. Students also find them more fascinating.

The loss of handwriting also may be a cognitive (认知的)opportunity missed. Several academic studies have found that good handwriting skills at a young age can help children express their thoughts better-a lifelong benefit.

It doesn't take much to teach better handwriting skills. At some schools in Prince George's County, elementary school students use a program called Handwriting Without Tears for 15 minutes a day. They learn the correct formation of manuscript letters through second grade, and cursive letters in third grade.

There are always going to be some kids who struggle with handwriting because of their particular neurological (神经系统的)wiring, learning issues or poor motor skills. Educators often point to this factor in support of keyboarding.

小题1:What is the author concerned about after 2011 SAT exams?

A.Keyboarding.

B.Shorthand

C.Handwriting.

D.Block letters.小题2:A poem by Robert mentioned in the passage is used to _________.

A.prove how valuable handwriting is

B.explain what a famous poet he is

C.show how unique his poem is

D.stress how fascinating the documents are小题3:The example of Handwriting Without Tears helps to argue that_________.

A.the schools are responsible for the loss of handwriting

B.the loss of handwriting is a cognitive opportunity missed

C.it doesn't take much to teach better handwriting skills

D.the culture is turning from the written word to the typed one小题4: According to the author, when is a perfect time to learn handwriting?

A.Kindergarten.

B.Primary school.

C.High school.

D.College.小题5:What is the author’s attitude towards this debate?

A.Devotion.

B.Encouragement.

C.critical.

D.Objective.

题型:单项选择题

网络管理中只允许被选择的人经由网络管理者访问网络的功能属于哪个功能

A.设备管理

B.安全管理

C.计费管理

D.性能管理

题型:单项选择题

厚朴的炮制宜选用

A.酒炙法

B.醋炙法

C.盐炙法

D.姜炙法

E.蜜炙法

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