简答螺杆泵流量不足或输出压力太低的原因？

根据板块构造学说，以下说法错误的是（　　）

A．一般来说，板块的内部结构比较稳定

B．随着板块的运动，地中海的面积将会越来越大

C．通常情况下，板块的交界处火山、地震活动频繁

D．我国是世界上火山地震灾害比较严重的国家之一

颈椎斜位标准片所见，错误的是（）

A.1～7颈椎显示于照片正中

B.近胶片侧椎间孔、椎弓根显示清楚

C.椎间孔显示于椎体与棘突之间，呈椭圆形

D.椎间隙清晰

E.下颌骨与颈椎重叠

One period of our lives when better results are demanded of us is, strangely enough, childhood． Despite being young we are expected to achieve good grades, stay out of trouble, make friends at school, do well on tests, perform chores at home and so on． It’s not easy．

The good news is that being likeable can help a child perform better． Likeable children enjoy many advantages, including the ability to cope（对付） more easily with stresses of growing up．

In her book Understanding Child Stress, Dr． Carolyn Leonard states that children who are likeable and optimistic are able to gain support from others． This leads to focus and resilience, the ability to recover from or adjust early to life stress; a child who has adequate emotional armor can continue down the path to success． Much research shows that resilience has enabled children to succeed in school, avoid drug abuse, and develop a healthy self-awareness．

Why does a likeable child more easily handle stress and do better in his or her life? Because likeability helps create what’s known as a positive feedback loop（回馈圈）． The positive feelings you want to see in other people are returned to you, creating constant encouragement and motivation to deal with the daily stress of life．

This feedback loop continues into adulthood． To return once again to the example of teaching, learning becomes easier with a likeable personality． Michael Delucchi of the University of Hawaii reviewed dozens of studies to determine if likeable teachers received good ratings because of their likeability or because they in fact taught well． Delucchi found that “Students who perceive（察觉） a teacher as likeable, in contrast to（比照） those who do not, may be more attentive to the information that the teacher delivers and they’ll work harder on assignments, and they will learn more．”

You may have noticed this pattern in your own life when you try to give some advice． The more positive your relationship with that person, the more he or she seems to listen, and the more you feel certain that that person has heard you and intends to act on your words．

小题1:The writer implies in the first paragraph that __________．

A．children are expected much than we usually think

B．life is not easy for every one of us

C．better education results in smarter children

D．to be a likable child is almost impossible小题2:According to Dr． Leonard, likeable children __________．

A．can cope more easily with stress independently

B．know how to avoid trouble and unpleasant events

C．are always optimistic and ready to help those in need

D．can achieve more and understand themselves better小题3:The term “emotional armor” in paragraph 3 means __________．

A．mental support from friends

B．mental support from adults

C．failures in life

D．ability to handle life stress小题4:The main purpose of the studies done by Michael Delucchi is to find __________．

A．if a likeable teacher has a positive personality

B．if a likeable teacher draws more attention

C．how a teacher’s likeability gains popularity

D．how a likeable teacher’s teaching style is formed小题5:The passage aims at proving that __________．

A．likeable people do better in life generally

B．likeable people do better in their childhood

C．social creatures enjoy more advantages

D．likeable people give better advice

影响股利政策的公司因素包括（）

A、盈余的稳定性

B、股东利益要求

C、资产的流动性

D、投资机会

在酶反应器的操作过程中要注意哪些问题。