容量为10kVA的单相照明变压器,电压为3300/220V,欲在副边接上60W、 2

题型:单项选择题

问题:

容量为10kVA的单相照明变压器,电压为3300/220V,欲在副边接上60W、 220V的白炽灯,若使变压器在额定状态下运行,原边电流值最接近于 ( )。

A.3.03A
B.4.52A
C.1.67A
D.4.09A

考点:注册公用设备工程师暖通空调专业知识电工学
题型:单项选择题

共5小题;每小题2分,满分10分)

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多于选项。(请把答案填在答案卷的横线上)

Today we begin a series of programs about learning disabilities.These are disorders in the ways that people understand or use language.They can affect the ability to listen or think, or to speak or to read and write.They can also affect the ability to do mathematics.小题1: Researchers believe that learning disabilities are caused by differences in the way that the brain works with information. They say children with learning disabilities are not unintelligent or do not want to work.小题2:

Researchers say that as many as one out of every five people in the United States has some  kind of learning disability.Almost three-million children in the United States receive some kind of help in school for a learning disability.

小题3:  Expels look for a difference between how well a child does in school and the level of intelligence or ability of the child.But there is no one sign of a disorder.A few signs of learning disability include not connecting letters with their sounds or not understanding what is read.A person with a learning disability may not be able to understand a funny story.They may not follow directions.They may not read numbers correctly or know how to start a task.小题4:  One  person may have trouble understanding mathematics.Another may have difficulty understanding what people are saying.Still another may not be able to express ideas in writing.These different kinds of learning disabilities are known by different names.For example,a person who has difficulty reading may have dyslexia(诵读困难症).

Experts say learning disabilities cannot be cured.小题5:   Teachers and parents can help young people with learning disabilities to learn successfully.

A.Different people have different kinds of learning disabilities.

B.Their brains just process information differently than other people.

C.People with learning disabilities have difficulty in communicating with others

D.But people who have them can be helped.E. Why does a person have a learning disability.

F. A person with a learning disability has unusual difficulty in developing these skills.

G. How can you tell if someone has a learning disability?

题型:单项选择题

整套量块检定完毕,每个量块都应单独定级,整套量块的级别是按这一套中()来确定的。

A.级别最高的哪一块

B.级别最低的哪一块

C.去掉一个最高级,去掉一个最低级,取其余各级别的平均值

题型:单项选择题

关于蛋白尿的叙述以下错误的是()

A.大、中、小分子均有的蛋白尿,见于肾小球肾炎

B.微量白蛋白尿,见于早期糖尿病肾病

C.本周蛋白尿,见于多发性骨髓瘤

D.肾组织性蛋白尿多为小分子量蛋白尿

E.β2-微球蛋白尿为肾小球病变的特征

题型:单项选择题

铸铁是含碳量大于2.1l%的铁碳合金,实际生产中铸铁含碳量一般在2.5%~4.0%之间。

题型:单项选择题

医务人员进行手的消毒,哪项描述是不正确的()

A.实施侵入性操作前

B.护理免疫力低下的患者或新生儿前

C.接触血液、体液和分泌物后

D.护理传染患者后

E.接触被致病微生物污染的物品前

更多题库