使用绝缘斗臂车进行等电位作业过程中，车不能熄火

2007年9月，国家旅游局推出了“亿万旅客文明行”活动，要求在各旅行社、饭店和Ａ级景区张贴《中国公民出境旅游文明行为指南》和《中国公民国内旅游文明行为公约》。对公民的旅游行为作出了明确规范。这是因为

①公民的权利和义务是相辅相成的②个人利益和国家利益是对立的③公民意识的核心是义务意识④维护国家的荣誉和利益是公民的义务

A．①②

B．①③

C．②③

D．①④

施主天线用于拾取来自施主基站（BTS）的（）信号，并同时转发上行链路信号，由于通信是点对点的，因此要求施主天线应具有（）和（）的特点。

网络广告被点击一次为一次印象。

Euthanasia has been a topic of controversy in Europe since at least 1936. On an average of six times a day, a doctor in Holland practices "active" euthanasia: (1) administering a lethal drug to a (2) ill patient who has asked to be relieved (3) suffering. Twenty times a day, life prolonging treatment is withheld or withdrawn (4) there is no hope that it can (5) an ultimate cure. "Active" euthanasia remains a crime on the Dutch statute books, punishable (6) 12 years in prison. But a series of court cases over the past 15 years has made it clear that a competent physician who (7) it out will not be prosecuted.

Euthanasia, often called "mercy killing", is a crime everywhere in Western Europe. (8) more and more doctors and nurses in Britain, Germany, Holland and elsewhere readily (9) to practicing it, most often in the "passive" form of withholding or withdrawing (10) The long simmering euthanasia issue has lately (11) into a sometimes fierce public debate, (12) both sides claiming the mantle of ultimate righteousness. Those (13) to the practice see themselves (14) sacred principles of respect for life, (15) those in favor raise the banner of humane treatment. After years (16) the defensive, the advocates now seem to be (17) ground. Recent polls in Britain show that 72 percent of British (18) favor euthanasia in some circumstances. An astonishing 76 percent of (19) to a poll taken late last year in France said they would like the law changed to (20) mercy killings. Obviously, pressure groups favoring euthanasia and "assisted suicide" have grown steadily in Europe over the years.

15（）

A.while

B.when

C.as

D.or

供应链管理覆盖了从（）到（）的全部过程。