ZETA信用风险分析模型中用采衡量流动性的指标是( )。A．流动资产/总资产 B．

Electronic mail has become an extremely important and popular means of communication.
The convenience and efficiency of electronic mail are threatened by the extremely rapid growth in the volume of unsolicited commercial electronic mail. Unsolicited commercial electronic mail is currently estimated to account for over half of all electronic mail traffic, up from an estimated 7 percent in 2001, and the volume continues to rise. Most of these messages are fraudulent or deceptive in one or more respects.
The receipt of unsolicited commercial electronic mail may result in costs to recipients who cannot refuse to accept such mail and who incur costs for the storage of such mail, or for the time spent accessing, reviewing, and discarding such mail, or for both. The receipt of a large number of unwanted messages also decreases the convenience of electronic mail and creates a risk that wanted electronic mail messages, both commercial and noncommercial, will be lost, overlooked, or discarded amidst the larger volume of unwanted messages, thus reducing the reliability and usefulness of electronic mail to the recipient. Some commercial electronic mail contains material that many recipients may consider vulgar or pornographic in nature.
The growth in unsolicited commercial electronic mail imposes significant monetary costs on providers of Internet access services, businesses, and educational and nonprofit institutions that carry and receive such mail, as there is a finite volume of mail that such providers, businesses, and institutions can handle without further investment in infrastructure. Many senders of unsolicited commercial electronic mail purposefully disguise the source of such mail.
Many senders of unsolicited commercial electronic mail purposefully include misleading information in the messages’ subject lines in order to induce the recipients to view the messages. While some senders of commercial electronic mail messages provide simple and reliable ways for recipients to reject (or "opt-out" of) receipt of commercial electronic mail from such senders in the future, other senders provide no such "opt-out" mechanism, or refuse to honor the requests of recipients not to receive electronic mail from such senders in the future, or both.
Many senders of bulk unsolicited commercial electronic mail use computer programs to gather large numbers of electronic mail addresses on an automated basis from Internet websites or online services where users must post their addresses in order to make full use of the website or service.
The problems associated with the rapid growth and abuse of unsolicited commercial electronic mail cannot be solved by the government alone. The development and adoption of technological approaches and the pursuit of cooperative efforts with other countries will be necessary as well.

The unwanted e-mail problem can be solved if ______.

A．the government takes action

B．a new technology is adopted

C．more people are aware of the problem

D．joint efforts are made and new technology is used

安设及投入运转时要保持输送机的平、（）、（）、牢，并注意刮板链的松紧程度。

婴幼儿易发生泌 * * 感染与下列何种因素有关（）

A.输尿管肌肉和弹力纤维发育不良

B.输尿管细长

C.输尿管走行弯曲

D.免疫系统功能未完善，抗感染能力差

E.以上都是

与吲哚美辛性质不符的是( )。

A．具有芳基丙酸结构显酸性
B．对光敏感、遇光可逐渐分解
C．在强酸、强碱条件下可发生水解
D．溶于丙酮、几乎不溶于水
E．抑制前列腺素合成酶

自从去年9月日本野田内阁强行非法对中国钓鱼岛实行所谓“国有化”以来，中国政府增派海监、渔政、海警等执法船进入中国钓鱼岛领海，加强 * * 巡航执法活动。去年12月13日，国家海洋局组织海监船编队和海监飞机首次开展钓鱼岛领海内海空联合 * * 巡航执法行动，此举实现了中国执法公务飞机飞抵钓鱼岛上空宣示主权的历史性突破。2013年8月10日，中国海警2350、1126、2102、2146舰船编队继续在中国钓鱼岛领海内巡航，据悉，这已经是中国连续第25天在钓鱼岛海域进行巡航执法。巡航期间，对发现的日方侵权船只严正申明中国政府对钓鱼岛的主权立场，并对其进行驱离。据报道，此次巡航，中国海警船在钓鱼岛领海内停留时间超过一天，是中国公务船在钓鱼岛巡航以来时间最长的一次。中国外交部发言人洪磊8日就中国海警编队在钓鱼岛海域 * * 执法答记者问时重申，钓鱼岛及其附属岛屿自古以来就是中国的固有领土，中方公务船在钓鱼岛海域巡航执法是行使本国固有主权。

结合材料运用当代国际社会的知识，分析材料中我国依法维护钓鱼岛领土主权的措施的依据。