痛觉传导通路上,第二级神经元在()。 A.前角细胞 B.后角细胞 C.薄束核和楔束核

题型:单项选择题 B1型题

问题:

痛觉传导通路上,第二级神经元在()。

A.前角细胞

B.后角细胞

C.薄束核和楔束核

D.丘脑

E.后根神经节

考点:神经电生理脑电图技术(主管技师)神经电生理脑电图技术(主管技师)综合练习神经电生理脑电图技术(主管技师)综合练习题库
题型:单项选择题 B1型题

血管瘤硬化剂治疗最常用()

A.无水酒精

B.2%鱼肝油酸钠

C.5%鱼肝油酸钠

D.5%甲醛

E.5%碘油

题型:单项选择题 B1型题

“学生—选课—课程”数据库中的三个关系
S(S#,SNAME,SEX,AGE,DEPARTMENT),主码是S=
C(C#,CNAME,TEACHER),主码是C#
SC(S#,C#,GRADE),主码是(S#,C#)

下列关于保持数据库完整性的叙述中,( )是不正确的。

A.向关系SC插入元组时,S#和C#都不能是空值(NLTL)

B.可以任意删除关系SC 中的元组

C.向任何一个关系插入元组时,必须保证关系主码值的唯一性

D.可以任意删除关系C中的元组

题型:单项选择题 B1型题

阅读理解。

     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

余选项。

     In the early 1950s, researchers found that people scored lower in intelligence tests if they could speak more than one language.    1   So which one of them is right? There is a new finding recently.

Researchers showed their latest studies at a meeting in February, 2011. The latest evidence shows that

being bilingual(双语的)does not necessarily make people smarter.    2   .

    Imagine you are driving down the highway. There are many things that could draw your attention and

you really need to be able to notice all of them.    3   Why? The answer is that bilingual people are often

better at controlling their attention.

    The best method to measure it is called the Stroop Test. A person is shown words in different colors.

The person needs to tell the colors of the words.    4   For example, the word  "blue" might be written in

red, but you have to say red. You need to ignore the word and pay more attention to its color so that

you can say correctly. The bilingual people continually practise this function because both languages are

active in their mind at the same time.

        5   Researchers say bilingual children are better able to separate a word from its meaning and are

more likely to have friends from different cultures. Bilingual adults are often four to five years later than

others in suffering from dementia (痴呆症). 

A. This would be easier if you are bilingual.

B. The problem is that the words are all names of colors.

C. This would be very difficult for them to achieve.

D. However, another research in the 1960s showed the opposite.

E. They would be cleverer than other people.

F. In addition, it might help people in other ways, too.

G. But researchers say it probably does make people better at certain skills.

题型:单项选择题 B1型题
求如图所示的交变电流的有效值,其中每个周期的后半周期的图象为半个周期的正弦曲线(   )

A.5A

B.5A

C.5/2A

D./2A

题型:单项选择题 B1型题

同类云有两层或以上且云高不一时,云状记()个。

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