产品的生命周期是指产品从研发开始直到进入市场的所经历的时间。

列尾控制盒在结构上由三块电路板组成，分别是（）、语音板和显示板。

哮喘患者最不宜选用的降压药为（）

A.利尿剂

B.α受体阻断剂

C.β受体阻断剂

D.二氢吡啶类钙离子通道阻滞剂

E.血管紧张素转换酶抑制剂

“天下第三行书”是指哪位书家的哪件作品？

阅读理解

     Working from home is more and more popular as a means of escaping the ninetofive office life.Why do you work under the eye of your boss when you can work in front of the TV in your slippers?Armed with

all the necessary things-telephone, computer, email and fax, many workers believe they can work as

effectively as their colleagues in the office.Being able to work wherever you like:from a busy city to a

village, and not having to stand the daily things, make working from home an attractive choice.If you wish, you can even work on a river boat.

     So what will become of the office tomorrow?It is possible that many could go into computer space

creating a new wave of virtual(虚拟的) offices.To minimize office in innercity areas, companies will have a work force made up of a network of home workers linked by an advanced communication and

information system.A central processing computer would be controlled by the manager who sends out

work schedules and oversees(监视) the activity of each employee.

     A video screen would be created, as the need for email or telephone becomes greater.Seeing the

mood and expressions of work colleagues, managers would have the ability to view several employees at

once on their screen.Employees would be encouraged to feed any information that may be useful to fellow workers into the computer to make the company work more effectively.As the company's lifeblood, the

computer would contain a record of all conversations and communication for future reference and hold

secret information such as accounts in password(口令) protected areas.

1. The passage is mainly about ________.

A. the importance of working in the future

B. how to escape your office

C. how to work with a computer

D. virtual offices in the future

2. According to the passage, which of the following things is NOT necessary for a virtual office?

A. A manager.  

B. An office building.

C. A telephone.  

D. A central processing computer.

3. Which of the following is an advantage of a virtual office?

A. There aren't strict time limits.

B. Employees aren't overseen by the manager.

C. Employees needn't see each other every day.

D. Fewer employees are needed in every company.

4. From the passage we can learn that ________.

A. a computer is the only necessary thing in a virtual office.

B. in a virtual office, all information is open to workers.

C. managers can observe their employees in a virtual office.

D. the number of employees will be smaller in a virtual office.

患者男，58岁。头痛，呕吐2个月余。行颅脑MRI示：右额叶占位。后行开颅探查+肿瘤切除术，病检示"胶质母细胞瘤"。

该患者应该接受的放射治疗剂量是（）

A.4500cGy

B.3500cGy

C.4500cGy

D.5000cGy

E.6000cGy

F.7000cGy