一个社会赖以生存和发展的基石是（） A.以人为本 B.诚信 C.信任 D.责任心

高渗性缺水的体液最终变化为

A．细胞外液缺水

B．细胞内液缺水

C．细胞内液缺水超过细胞外液缺水

D．细胞内外液等量缺水

E．细胞外液缺水超过细胞内液缺水

如图所示为X、Y两种不含结晶水的固体物质的溶解度曲线。根据图示判断下列说法中，正确的是

A.降温能使Y的不饱和溶液变成饱和溶液

B.在t₂℃时，X的溶解度大于Y的溶解度

C.在t₁℃时，X的饱和溶液的溶质质量分数为25%

D.将t₂℃时X的饱和溶液降温到t₁℃，溶液中会析出晶体

作出罚款决定的行政机关是否必须与收缴罚款的机构分离？

A small group of Internet security specialists gathered in Singapore to start up a global system to make e-mail and e-commerce more secure, end the rapid growth of passwords and raise the bar significantly for Internet fraud, spies and troublemakers.

The Singapore event included an elaborate technical ceremony to create and then securely store numerical keys that will be kept in three hardened data centers there, in Zurich and in San Jose, Calif. The keys and data centers are working parts of a technology known as Secure DNS, or DNSSEC. DNS refers to the Domain Name System, which is a directory that connects names to numerical Internet addresses. Preliminary work on the security system had been going on for more than a year, but this was the first time the system went into operation, even though it is not quite complete.

The three centers are fortresses made up of five layers of physical, electronic and cryptographic security, making it virtually impossible to damage the system. Four layers are active now. The fifth, a physical barrier, is being built inside the data center.

The technology is viewed by many computer security specialists as a ray of hope amid the recent cascade of data thefts, attacks, disruptions and scandals, including break-ins at Citibank, Sony, Lockheed Martin, RSA Security and elsewhere. It allows users to communicate via the Internet with high confidence that the identity of the person or organization they are communicating with is not being tricked or forged.

Internet engineers like Dan Kaminsky, an independent network security researcher who is one of the engineers involved in the project, want to counteract three major deficiencies in today’s Internet. There is no mechanism for ensuring trust, the quality of software is uneven, and it is difficult to track down bad actors.

One reason for these flaws is that from the 1960s through the 1980s the engineers who designed the network’s underlying technology were concerned about reliable, rather than secure, communications. That is starting to change with the introduction of Secure DNS by governments and other organizations.

The event in Singapore capped a process that began more than a year ago and is expected to be complete after 300 so-called top-level domains have been digitally signed. Before the Singapore event, 70 countries had adopted the technology, and 14 more were added as part of the event. While large countries are generally doing the technical work to include their own domains in the system, the association of Internet security specialists is helping smaller countries and organizations with the process.

It is suggested in Paragraph 4 that（）

A. the Net security system has protected lots of companies from data thefts

B. scientists sees the Net Security System as a promising technology

C. companies like Sony are undergoing an Internet security crisis

D. communication via the Internet makes people more confident

在增强型电源系统中IDG具有（）

A.不分左右发动机IDG滑油油面指示

B.IDG内滑油温度达200°C自动热脱开

C.IDG内恒装提供24000RPM转速

D.以上A+B+C