由于个体变异所导致的样本统计量与总体参数之间的差异是A.内容选择误差 B.随机测量误

题型:单项选择题

问题:

由于个体变异所导致的样本统计量与总体参数之间的差异是

A.内容选择误差

B.随机测量误差

C.抽样误差

D.系统误差

E.非随机误差

考点:卫生资格考试(中初级)疾病控制基础知识疾病控制主治医师基础知识3
题型:单项选择题

阅读理解并根据短文内容回答问题。

      The Smallest Bird The little bird takes nectar (花蜜) from a flower. This sweet

liquid (液体) is food for the bird. It uses its long bill to get the nectar deep (深) in

the flower. The little bird is a hummingbird (蜂鸟). Hummingbirds are the smallest

birds in the world.

      The hummingbird makes a nest (窝). The nest looks like a very small cup. Soon

there are two white eggs in the nest. The eggs are no bigger than peas (豌豆). Little

birds come out of the eggs. They are very hungry. Their parents bring them nectar.

They put their long bills down the necks of the babies to feed (喂) them nectar. 

      Their baby birds stay in the nest about three weeks. They leave the nest when they

are big and strong enough to fly. Soon they can build their own nests. They can get

their own nectar. They can feed their own very small babies.

1. What is the name of the smallest bird in the world?

   ________________________________________________________

2. What does the bird's nest look like? 

   ________________________________________________________

3. Is the bird's nest very big? 

   _________________________________________________________

4. How long do the baby birds stay in the nest? 

   _________________________________________________________

5. What does the underlined word "bill" mean (意思是) in Chinese? 

   _________________________________________________________

题型:单项选择题

图8为某地区的平面图,图9为图8中河流R的纵剖面图,表为图8中P地的月平均温度和月平均降水数据。据此回答19—23题。

小题1:根据表中的气候数据,判定P地所在地区属于

A.亚热带

B.季风气候

C.温带

D.大陆性气候小题2:河流R的水源补给主要来源于

A.夏季降水

B.春季降水

C.深层地下水

D.冰川融水小题3:近年来,河流尾闾地区的农业区不断缩小,尾闾湖基本消失,主要原因可能是

A.中上游地区工业生产发展

B.臭氧层空洞

C.中上游地区沙尘暴增加

D.中上游地区农业用水量增加小题4:近年来,分布于冲积——洪积扇前缘的泉水大量消失,主要原因可能是

A.温度下降

B.温度升高

C.上游森林大量砍伐

D.过量抽取地下水小题5:协调本地区发展和环境之间关系的途径有

A.增加移民

B.控制人口数量

C.扩大耕地面积

D.保育天然植被

题型:单项选择题

下图是肾单位结构模式图,请据图回答:

(1)血液从[ ]________滤过到[ ]________成为原尿。

(2)原尿经过[ ]________的重吸收作用,形尿液。

(3)与[3]内液体相比,[6]内液体不含______________________。

(4)与原尿相比,尿中不含_________,因为____________________________。

(5)尿的形成包括_______________、_______________和___________三个过程。

(6)图中流动脉血的结构序号是_____________________。

(7)肾单位中血液由动脉血变静脉血是在______________________。

题型:单项选择题

单位的()对本单位的内部治安保卫工作负责。

A.主要负责人

B.经理

C.董事长

D.部门经理

题型:单项选择题

()的目的在于增加顾客和其他相关方满意的机会。

A.领导作用

B.全员参与

C.注重实效

D.持续改进

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