经纪人的特点是（）。 A.无商品所有权 B.不经手现货 C.为买卖双方提供信息而起中

钢轨探伤仪的动态范围加抑制和不加抑制相同。

以下哪些人不是艾滋病的高危人群（）

A.同性恋者

B.共用针具静脉注射毒品者

C.因病经常输血或血液制品者

D.艾滋病患者的配偶

E.有固定的性伴侣者

“Get your hands off me, I have been stolen,” the laptop, a portable computer, shouted. That is a new solution to laptop computer theft: a program that lets owners give their property a voice when it has been taken.

The program allows users to display alerts on the missing computer’s screen and even to set a spoken message. Tracking software for stolen laptops has been on the market for some time, but this is thought to be the first that allows owners to give the thief a piece of their mind.

Owners must report their laptop missing by visiting a website, which sends a message to the model: a red and yellow “lost or stolen” sign appears on its screen when it is started. Under the latest version（版本）of the software, users can also send a spoken message.

The message can be set to reappear every 30 seconds, no matter how many times the thief closes it.” One customer sent a message saying,’ You are being tracked. I am right at your door’,” said Carrie Hafeman, chief executive of the company which produces the program, Retriever.

In the latest version, people can add a spoken message. For example, the laptop’s speakers will say: “Help, this laptop is reported lost or stolen. If you are not my owner, report me now.”

The Retriever software package, which costs $29.95 but has a free trial period, has the functions of many security software programs .Owners can remotely switch to an alternative password if they fear that the thief has also got hold of the access details.

If a thief accesses the internet with the stolen laptop, Retriever will collect information on the internet service provider in use, so that the police can be alerted to its location.

Thousands of laptops are stolen every year form homes and offices, but with the use of laptops increasing, the number stolen while their owners are out and about has been rising sharply.

Other security software allows users to erase data remotely or lock down the computer.

小题1:The expression “to give the thief a piece of their mind “can be understood as “_______”

A．to give the thief an alert mind

B．to express the owners’ anger to the thief

C．to remind the thief of this conscience

D．to make the thief give up his mind小题2:Different from other security software, Retriever can_______.

A．record the stealing process

B．help recognize the lost laptop

C．lock down the computer remotely

D．send a spoken message小题3: One function of the program is that it allows the owner to _______ at a distance.

A．change some access details for switching on the laptop

B．turn on the laptop by using the original password

C．operate the laptop by means of and alternative password

D．erase the information kept in the stolen laptop小题4:Which of the following can best summarize the main idea of the passage?

A．With no Retriever, thousands of laptops are stolen every year.

B．A new soft ware provides a means to reduce laptop theft.

C．Retriever has helped to find thieves and lost computers.

D．A new program offers a communication platform with the thief.

苯丙酮尿症属于

A．常染色体畸变

B．性染色体畸变

C．先天性糖代谢异常

D．氨基酸代谢异常

E．脂类代谢异常

压力管道操作人员划分为6个级别，Ⅲ级允许操作工业管道的级别为（）。

A.GC1、GC2、GC3

B.GC2、GC3

C.GC3

D.GA1、GA2