问题 单项选择题

下列哪项是原发性慢性肾上腺皮质功能减退症典型体征()

A.皮肤紫纹

B.轻度肥胖

C.皮肤黏膜色素沉着

D.皮肤多汗及低热

E.脉率增快

答案

参考答案:C

解析:原发性慢性肾上腺皮质功能减退症又称Addi-son病,继发性可见下丘脑一垂体功能低下患者,由于CRF或ACTH的分泌不足,以致肾上腺皮质萎缩。原发性肾上腺皮质功能减退时糖皮质激素分泌减少,对黑色素细胞刺激素(MSH)和促肾上腺皮质激素(ACTH)分泌的反馈抑制减弱,患者出现皮肤和黏膜色素沉着,多呈弥漫性,以暴露部,经常摩擦部位明显。继发性肾上腺皮质功能减退症患者的MSH和ACTH水平明显降低,故无色素沉着现象。

选择题
阅读理解

“Get your hands off me, I have been stolen,” the laptop, a portable(便携式的)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(警报)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 to 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 (主管) 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, please report me now.”

The Retriever software package(软件包), which costs $29.95 (£21) 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 from 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(删除)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 his 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 an 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 software 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.