关于圆周运动的说法，正确的是（） A．做匀速圆周运动的物体，所受合力一定指向圆心

Ask just about any college student you know,and he is likely to tell you that he is a member of facebook.com.Many students say they check their e-mail.It’s so popular “facelooking”has become a verb “Everywhere everyone is doing it,”college student Katie Silverman said,“It’s like everyone’s center of life.”

Facebook is an online social meeting place where students create profiles (简介)，share personal information, and meet other members. It is password protected and targeted to high school and college students;members must have an edu.email address to join.

Many students say it has changed their social lives, giving them an easy way to find and chat with classmates who share their interests.“Some people might be too shy to go to talk to someone they like in one of their classes,but on facebook it’s a lot easier to strike up a conversation,”said Rahul Vanjani.

The website was founded by two Harward University students who wanted to meet more of their classmates.It became so popular that the website is at 2,200 colleges and at 22,000 high schools.It says that it has 6 million active users,two—thirds of whom are on it every day.Many of the facebook members said their parents had no idea they were on it .“No way.My parents certainly don’t know about it,” said a college senior who asked us not to use his name.

To keep it popular,Facebook says it stops students posting improper information.Some students have paid the price.At Fisher College in Boston,two students were kicked out for using facebook.com to do something that is against the law.At North Carolina State University,four students were punished for posting photos about drinking.

小题1:The passage is mainly about____.

A．student’s idea about Facebook

B．the development of Facebook

C．the popularity of Facebook with students

D．the rules of Facebook小题2:To become a member of Facebook,you must_____.

A．have an edu,e—mail dress

B．have your own profile

C．be a high school student

D．offer main personal information小题3:By saying “Some students have paid the price”in the last paragraph,the author means more students_____.

A．will have to pay money for being on Facebook

B．always use Facebook to do something against the law

C．have been punished for doing some improper things on Facebook

D．often stop others from posting improper information on Facebook小题4:We can learn about Facebook from the passage that______.

A．the information that students offer to Facebook is secret to others

B．Facebook is at more colleges that at high schools

C．6 million active users of Facebook are on it every day

D．many students don’t want their parents to know they are facebooking

有机磷农药中毒错误的是（）

A.常见原因有生产性中毒、使用性中毒和生活性中毒

B.生活性中毒主要由于误服、自服引起

C.有机磷农药排泄较快，24小时内由尿排泄

D.主要作用是增强胆碱酯酶活性

E.可出现胆碱能神经兴奋的表现

已知一核素半衰期为2天，剂量为8mCi，请问8天后为（）

A.2mCi

B.0.5mCi

C.1mCi

D.0mCi

E.1.5mCi

在施工过程中，由于业主或工程师指令修改设计、修改实施计划、变更施工顺序，造成工期延长和费用损失，承包商可提出索赔。这种索赔属于（）引起的索赔。

A、地质务件的变化

B、不可抗力

C、工程变更

D、业主风险

企业拟投产一新项目，预计新项目产品的市场适销期为5年，新产品的生产可利用原有旧设备，该设备的原值为400万元，税法规定的使用年限为4年，已使用1年，按双倍余额递减法计提折旧，税法规定的残值为20万元。目前变现价值为150万元，5年后的变现价值为10万元。生产A产品需垫支营运资本50万元，项目投产后，每年可以为公司增加税前经营利润80万元。该公司目前的资产负债率为60%，投产新项目后资本结构不变，负债的税后资本成本为7%；该公司过去没有投产过类似项目，但新项目与一家上市公司的经营项目类似，该上市公司权益的β值为1.6，其资产负债率为50%。目前证券市场的无风险收益率为5%，证券市场的平均收益率为10%。两个公司的所得税税率均为40%。
要求：

计算项目结束时回收的资金数额。