皮皮学，免费搜题
登录
搜题
【多选题】
在杂质半导体中,多数载流子的浓度取决于 ( ),而少数载流子的浓度与 ( )有很大关系。A.
温度
B.
掺杂工艺
C.
杂质浓度
D.
半导体缺陷
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】____ children tend to prefer sweets to meat.
A.
The most
B.
Most
C.
Most of
D.
The most of the
【简答题】Which cost in raising children has increased the most?
【简答题】However, most children are 2 ( face ) with a completely different situation. Most parents fear that s will pr children from increasing new knowledge and 3 the children will fail in ...
【单选题】Children's fears come and go, but most children experience similar types of fears at approximately the same age. For toddlers, the worst fears are often associated with separation and change. Toddlers...
A.
Members of the 'contact desensitization group' were told about snakes and how to approach them, were encouraged by an adult to approach a snake, were given praise when they tried, and watched one adult hold the snake.
B.
The 'contact desensitization without touch group' received all that group A did, but no one touched the snake.
C.
The 'verbal input plus modeling group' received verbal input and modeling (when the adult touched the snake).
D.
The 'verbal input only' received only verbal assurances from the adult.
E.
Finally, one group of children received no treatment and, hence, was called the 'no treatment group.' The researchers used something called the Behavior. Avoidance Test to see if there was a reduction in avoidance of the snake. The results showed that 82 percent of the children in the contact desensitization group reduced their fear of snakes. Children in the other groups also reduced their fear, but not as dramatically. Fears are something we all have to live with. When they get out of hand, a technique like the one we described here can be very useful in assisting a child through a difficult experience. What is the meaning of the word 'index' as it is used in P A．An indicator or measurement of something. B．A list or catalog of information. C．An object used to point or indicate. D．A relation or ratio of one quantity to another.
相关题目：
参考解析：
知识点：
题目纠错 0
发布
