胃溃疡的好发部位是A．胃窦部大弯侧 B．胃窦部小弯侧 C．胃体部大弯侧 D．胃体部小

必须建立和持续改进实验室（），并负责组织实施和严格监控。应覆盖血液检测和相关服务的所有过程。

保险合同中并不是所有的保险都是适用损失补偿原则的，也有一些例外情况，下列属于损失补偿原则的例外的是（）。

A.财产损失保险

B.重置成本保险

C.责任保险

D.信用保证保险

Are some people born clever, and others born stupid? Or is intelligence developed by our environment and our experience? Strangely enough, the answer to these questions is yes. To some extent our intelligence is given to us at birth, and no amount of education can make a genius out of a child born with low intelligence. On the other hand, a child who lives in a boring environment will develop his intelligence less than one who lives in rich and varied surroundings. Thus the limits of person’s intelligence are fixed at birth, whether or not he reaches those limits will depend on his environment. This view, now held by most experts, can be supported in a number of ways.

It is easy to show that intelligence is to some extent something we are born with. The closer the blood relationship between two people, the closer they are likely to be intelligence. Thus if we take two unrelated people at random from population, it is likely that their degree of intelligence will be completely different. If, on the other hand, we take two identical twins, they will very probably be as intelligent as each other. Relations like brothers and sisters, parents and children, usually have similar intelligence, and this clearly suggests that intelligence depends on birth.

Imagine now that we take two identical twins and put them in different environments. We might send one, for example, to a university and the other to a factory where the work is boring. We would soon find differences in intelligence developing, and this indicates that environment as well as birth plays a part. This conclusion is also suggested by the fact that people who live in close contact with each other, but who are not related at all are likely to have similar degree of intelligence.

小题1: The writer is in favor of the view that man’s intelligence is given to him____________.

A．at birth

B．through education

C．neither at birth nor through education

D．both at birth and through education小题2:If a child is born with low intelligence, he can_____________________.

A．become a genius

B．still become a genius if he should be given special education

C．reach his intelligence limits in rich surroundings

D．not reach his intelligence in his life.小题3:The example of the twins going to a university and to a factory separately shows_________.

A．the importance of their intelligence

B．the importance of their positions

C．the role of environment on intelligence

D．the part that birth plays

随访15年260名宫颈癌患者治疗情况，资料整理时将生存时间划分为组距为1年的多个时间段，估计生存率可采用

A．秩和检验
B．寿命表法
C．方差分析
D．乘积极限法
E．log-rank检验

设有关系模式W(C，P，S，G，T，R)，其中各属性的含义是：C为课程，P为教师，S为学生，G为成绩，T为时间，R为教室，根据定义有如下的函数依赖集：
F=C→G(S，C)→G(T，R)→C，(T，P)→R，(T，S)→R
关系模式W的一个码是______，W的规范程度最高达到______。若将关系模式W分解为3个关系模式W1(C，P)、W2(S，C，G)、W3(S，T，R，C)，则W1的规范化程度最高可达到______，W的规范化程度最高可达到______，W3的规范化程度最高可到达______。