五味子果实含有的化学成分是（）A、木脂素类 B、脂肪油 C、挥发油类 D、有机酸类

诊断癫痫主要是靠()

A．脑电图检查

B．病史询问

C．SPECT

D．MRI

E．神经系统体格检查

探究凸透镜成像的大小与哪些因素有关

【提出问题】小明通过前面物理知识的学习，知道放大镜就是凸透镜．在活动课中，他用放大镜观察自己的手指（图1甲），看到手指______的像；然后再用它观察远处的房屋（图1乙），看到房屋______的像．（选填“放大”、“等大”或“缩小”）

他想：凸透镜成像的大小可能与哪些因素有关？

【进行猜想】凸透镜成像的大小可能与______有关．

【设计并进行实验】

（1）首先，王聪同学先将凸透镜对着太阳光，调整凸透镜和白纸间的距离，直到太阳光在白纸上会聚成一个最小、最亮的点，如图2所示，这一操作的目的是______；

（2）点燃蜡烛后，王聪调节烛焰、凸透镜和光屏的高度，使它们的中心大致在同一高度，其目的是使像能成在______．

（3）王聪在图3所示位置得到一个清晰的像．老师要求她在凸透镜不动的情况下．在光屏上再成一个更小的实像，小周应当把蜡烛向______移动．同时把光屏向______移动．

（4）王聪在所示的光具座上，不断改变蜡烛与透镜间的距离，并移动光屏进行实验，所获得的实验数据如右表所示

①分析数据可知物体到凸透镜的距离越短，光屏上像的大小就越______，同时发现像到凸透镜的距离就越______．

②在最后一次实验中，物距为8厘米，王聪从透镜的______填“左”或者“右”）侧通过透镜可以看到一个清晰的正立的像．利用这种成像规律可制成______镜．

③王聪在照毕业照时，摄影师发现两旁还有同学没有进入取景框内，这时摄影师应使照相机______同学（选填“靠近”或“远离”），同时还应______照相机的暗箱长度（选填“增长”、“缩短”或“不改变”）．

④王聪把自己的近视眼镜放在凸透镜与蜡烛之间，发现光屏上的像变得模糊不清．他应当向______移动光屏，可再次得到清晰的像．

对下列化学事实的解释不正确的是

There are many ways to find a job. It can be as easy as walking into a neighborhood store to look at the announcement board. Local stores often have areas where people can put small signs telling what kind of service they need or can provide. Such services include caring for children or cleaning houses.

Or, job searchers can look in the newspaper. Local newspapers have employment announcements placed by companies seeking workers.

Another popular tool for finding jobs is the Internet. For example, people in four hundred and fifty cities around the world can use the Craigslist Web site to buy objects, meet people or find a job. Craigslist says that it receives two million new job listings each month.

Another useful way to find a job is through a college or a university. For example, students at the University of Texas in Austin can go to the Career Exploration Centre to get help in finding a job. Of course, looking for a job requires knowing what kind of work you want to do. For example, there is a book called “What Color is Your Parachute(降落伞)？”by Richard Bolles. This book has been helping people choose a career since it was published in nineteen seventy.

Some experts also help people find jobs. Susan W. Miller owns a company called California Career Services in Los Angeles. She says her company helps people find jobs by first helping them understand their strengths, goals and interests. Then she provides them with methods and resources to help them find the right job.

小题1:What is the passage mainly about? __________

A．Finding a job

B．College students’ part-time jobs

C．Craigslist Web site

D．The relation between study and work小题2:By logging on the Craigslist Web site, you can _________ .

A．sell your old things

B．do some shopping online

C．create your own announcement board

D．get useful information about 450 cities小题3:“What Color is Your Parachute(降落伞)？”is a book giving tips to those who want to ________ .

A．work on the plane

B．buy a parachute

C．publish a book

D．find a suitable job小题4:It can be learned from the passage that _______ .

A. companies often put job information in local shops.

B. the Internet is the most popular tool for job hunters in the USA.

C. Susan W. Miller’s company is helping people choose careers

D. California Career Services mainly serves university students.

小题5:How many ways of finding jobs are mentioned in the passage?

A．Three

B．Four

C．Five

D．Six

在不考虑风险和通货膨胀的情况下，可用()代表时间价值。

A.利率

B.利息

C.平均资金利润率

D.平均报酬率

E.资本成本率