ASTM是哪个国家标准（）？A、德国标准 B、日本标准 C、英国标准 D、美国

下列各句中，没有语病的一句是

A．污水排海工程技术是借助远离岸边并置于海床上的多孔扩散器，将经过一定程度处理的城市污水均匀的排入海域。

B．2006年2月9日11点50分，第29届奥委会的两个代表团，通过首都机场临时设置的“奥运绿色通道”，办理了各种相关手续，顺利登机前往都灵。

C．文明社会的一个重要特征，就是公民对法律是否信仰，它体现了一个国家，一个民族的文明、民主和进步。

D．这所创建于上世纪20年代初期的商学院是这座滨海城市的唯一的一所大学，城里的很多孩子一直对这里充满着神秘感。

克林顿总统在任期间，一向奉行友好的对华政策，中美经济贸易、军事、外交各方面的关系都进入了一个崭新的阶段，他之所以这样做是因为( )

A．出于美国利益的考虑，发展对华关系有利于美国利益的增进

B．克林顿在国会力薄势单，需要中国支持

C．为了帮助中国迅速强大

D．可以在经贸关系中更好地剥削中国

承担责任最重要的是国家责任和社会责任，所以个人和家庭利益不该追求。 [ ]

Passage Four

Despite their names, satin and soman are exceptionally ugly sisters. They are organophosphorous nerve gases. They are cheap and simple to manufacture. And mere milligrams—just a drop—of either is enough to kill an adult in a couple of minutes. They therefore make particularly fine weapons of mass destruction, equally popular with rogue dictators who have not been able to build nuclear bombs and with weird cults such as Aum Shinrikyo, which gassed the Tokyo subway in 1995.

Detecting them soon enough to prevent their effects can be difficult. Even detecting them after the event—if you are, for example, a United Nations weapon inspector—can be haphazard. But help may be at hand. A paper in this month’s edition of Analytical Chemistry, by George Murray and his team at John Hopkins University’s Applied Physics Laboratory in Laurel, Maryland, reports a new way of picking up minute qualities of the two gases without the risk of false alarms from legitimate organophosphorous compounds such as insecticides.

Dr Murray’s detector consists of a fiber-optic cable that has one end plugged into a laser and the other coated with a metal called europium. The laser generates blue light, and europium has the property of shining red when exposed to blue light of the correct wavelength—an effect that is exploited in many optical devices. But the metal possesses a second property that makes it uniquely suitable for Dr. Murray’s purpose: it reacts ply with organophosphates, and when it does so, the wavelength of the light that is emitting changes perceptibly.

To stop his detector going off in response to the wrong signals such as insecticide on the flea collar of a dog, Dr Murray has resorted to a second trick. The europium is embedded in a plastic film that binds specifically to sarin or soman (they are very similar molecules), using special pockets called molecular imprints that have been chemically etched into it. The organophosphates commonly used as pesticides do not fit into these pockets; and so fail to react with the metal. The result is a detector that is both sensitive ( it can pick up concentrations of as seven nerve-gas molecules in a trillion) and reasonable fast (it is able to sound the alarm within 30 seconds).

So far, Dr Murray has tested his device only on soman dissolved in water. This is mainly a safety measure, because water-borne nerve agents are easier to handle than those in gaseous form. But soman or sarin-contaminated water supplies are a real hazard in themselves—and not just in far-flung war zones. In America, for example, there are occasional leaks from military bases. The most recent was from Tooele Chemical Disposal Facility in Utah, one of the sites where the country’s chemical weapons stockpile is being destroyed. At the moment it would be hard to work out if any material from such a spill had found its way into the water supply until people started to become ill.

Dr Murray seems confident, however, that his technology will work just as well on sarin and saman gas, and has prepared "smart" cards coated with the mixture of europium and plastic to detect airborne nerve gases. Unfortunately, he does not, at the moment, have access to any place where the safety regulations will permit him to try them out. But if UN inspectors were ever allowed back into Iraq, he might have a chance.

What is the function of Dr Murray’s device ？（）

在DNS区域中创建邮件交换记录时，需要设置优先级来指明邮件服务器的优先选择顺序请问，哪个数字表示服务器具有最高的优先级（）

A.10

B.9

C.1

D.0