编制服务计划的基础工作是( )。 A．项目规划 B．确定提供服务的程序 C．编制服

男孩8岁，1998年因发热1周，伴畏寒，头痛呕吐1次，纳差，便秘4天，无腹痛，病前吃私人制的冰棒。体检：体温38.8℃，神志清，淡漠，舌苔厚，心肺无异常，腹略胀，肝肋下2cm，脾肋下3cm，躯干见数个淡红色斑丘疹，压之退色。

（假设信息）入院后检查结果为血培养阴性，外斐试验阴性，嗜异凝集试验阴性，血常规白细胞数4.2×10⁹ /L，中性粒细胞0.76，嗜酸粒细胞为0，大便病毒分离阴性，血肝功能检查总胆红素17μmol/L，一分钟胆红素6μmol/L，ALT80U，AST40U，肥达反应O效价1：80，H效价1：160。根据上述情况，该病人最可能的诊断是（）

A.伤寒

B.病毒感染

C.急性病毒肝炎

D.血吸虫病

E.钩端螺旋体病

一天下课后，王鹏和王磊这一对双胞胎正在争吵．王鹏说：“种在肥沃的土壤中的种子先发芽．”王磊说：“种在贫瘠的土壤中的种子先发芽．”

（1）你认为谁说得对？为什么？

（2）种子萌发是否需要从外界吸收无机盐呢？王鹏和王磊设计了以下实验：①将适量的土壤分别装入A、B两个烧杯中；②在两个烧杯中各种上5粒小麦种子；③定期在A烧杯中浇清水，在B烧杯中浇配置的完全营养液；④观察两个烧杯中种子的萌发情况．根据王鹏和王磊的实验设计回答下列问题．

①本实验设计中的变量是______．

②你认为他们设计的A、B两组实验是对照实验吗？为什么？

③如果你认为该实验方案还可以进一步改进，请提出你的修改意见．

CHICAGO (Reuters) - Smoking not only can wrinkle(起皱纹) the face and turn it yellow -- it can do the same to the whole body, researchers reported on Monday.

The study, published in the Archives of Dermatology, shows that smoking affects the skin all over the body -- even skin protected from the sun.

"We examined non-facial skin that was protected from the sun, and found that the total number of packs of cigarettes smoked per day and the total years a person has smoked were linked with the amount of skin damage a person experienced," Dr. Yolanda Helfrich of the University of Michigan, who led the study, said in a statement.

"In participants older than 65 years, smokers had significantly more fine wrinkling than nonsmokers. Similar findings were seen in participants aged 45 to 65 years," Helfrich's team added in their report.

The researchers tested 82 people, smokers and nonsmokers, taking pictures of the inner right arms. They ranged in age from 22 to 91 and half were smokers. Independent judges decided how wrinkled each person's skin was.

When skin is exposed to sunlight, notably（尤其）the face, it becomes coarse, wrinkled and discolored with a pale yellow tint, Helfrich's team wrote.

Several previous studies have found that cigarette smoking contributes to premature（过早的）skin aging as measured by facial wrinkles, the study said, but little has been done to measure the aging of skin not exposed to light.

The report did not discuss the mechanism involved but previous research has found that cigarette smoke, among other things, causes blood vessels（血管）beneath the skin to constrict（紧缩）, reducing blood supply to the skin.

Smoking can also damage the connective tissue (组织)that supports both the skin and the internal organs.

小题1:The best title for this passage would be_______.

A．The danger of smoking

B．Smoking causes skin aging

C．Quit smoking for health

D．A survey of smokers小题2:It can be inferred from the study _______ .

A．smoking won’t make skin protected from the sun

B．smoking will do damage to skin rather than other organs

C．smokers over 65 usually won’t worry about their skin

D．the age of smokers is not connected with the result of the test小题3: From the passage smoking results in skin aging mainly because_____.

A．it will lower blood supply to skin

B．it can make you feel tired

C．it can make skin come off

D．it can make blood run faster小题4:The main purpose of the passage is to ______.

A．inform people about the result of the study

B．advise people how to protect skin

C．warn people not to smoke again

D．introduce a new way of avoiding skin aging

下列症状和体征与葡萄胎有关的是（）

A.妊娠高血压综合征

B.先兆子痫

C.子宫大于妊娠月份

D.血HCG升高

E.以上各项均是

企业应用软件开发的需求分析阶段，其主要任务是明确企业的

A．数据流图

B．业务流图

C．组织结构

D．应用需求