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46～50题基于以下题干： 一个部队有4个师，编号依次为一、二、三和四。每个师中恰好配备一个装甲旅和一个导弹旅。这8个旅中的每一个都是在1967年、1968年和1969年这3年中的某一年组建的，且满足以下条件： (1)每一个师中的装甲旅不是比导弹旅组建得早就是和导弹旅在同一年组建； (2)二师中的装甲旅和一师中的导弹旅是在同一年组建的； (3)三师中的装甲旅和四师中的导弹旅是在同一年组建的； (4)二师中的装甲旅和三师中的装甲旅不是在同一年组建的； (5)一师中的装甲旅和三师中的导弹旅是在1968年组建的。 若三师的装甲旅是在1968年组建的，则下面哪一句话可能正确
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我国宪法实施的组织保障主要有( )。
从下列每篇短文的问题后所给的四个选择项中选出一个最佳答案。Passage One Questions 21 to 25 are based on the following passage. Your passport is your official identification as an American citizen. In America，most people never consider obtaining a passport unless they are planning a trip out of the country. In Europe, where travel from one country to another is much more common，almost everyone carries a passport. A passport is final proof of identity in almost every country in the world. In 1979 almost 15 million Americans held passports. Most of these passports were obtained to travel outside the country because，except for a few Western nations。passports are required to enter every country. And if you travel abroad，you must have a valid passport to reenter the country. When traveling abroad，you will need a passport for identification when exchanging dollars for francs or marks or other foreign currency. You may also need your passport to use a credit card，buy an airplane ticket or check into a hotel. As a passport is an official U. S. document. it is valuable as identification in any emergency cases，such as floods，fires，or war. Don’t confuse passports and visas. Whereas a passport is issued by a country to its citizens. a visa is official permission to visit a country granted by the government of that country. For some years，many countries were dropping their visa requirements，but that trend has reversed. Argentina，Brazil，and Venezuela now require visas from U. S. citizens. They may be obtained from the embassy of the country you wish to visit. Passport applications are available at passport agency offices in large cities like Boston，New York，or Chicago. In smaller cities，applications are available at post offices and at federal courts. To get your first passport，you must submit the application in person. along with a birth certificate and two pictures. Passports are beneficial for______.
下列短文中有十个空白，每个空白有四个选项。根据上下文要求选出最佳答案。Henry’s job was to examine cars which crossed the frontier to make sure that they were not smuggling anything into the country. Every morning，except at weekends，he (11) see a factory worker coming up the hill towards the frontier， (12) a bicycle with a big load of old straw on it. When the bicycle arrived the frontier，Henry used to stop the man and order him to take the straw off. Then he would examine the straw very carefully to see (13) he could find anything，after which he would look in all the man’s pockets before he let him tie the straw up again. The man would then put it on his bicycle and go off down the hill with it. Although Henry was always (14) to find gold or jewelry or other valuable things hidden in the straw，he never found (15) ，even though he examined it very carefully. He was sure that the man was smuggling something，but he was not (16) to imagine what it could be. Then one evening，after he had looked through the straw and emptied the factory worker’s pockets (17) usual，he said to him，“Listen，I know that you are smuggling things (18) this frontier. Won’t you tell me what it is that you’re bringing into the country so successfullyI’m an old man，and today’s my last day on the job. Tomorrow I’m going to (19) . I promise that I shall not tell anyone if you tell me what you’ve been smuggling. ”The factory worker did not say anything for (20) . Then he smiled，turned to Henry and said quietly：“Bicycles. ”
Passage Three Questions 31 to 35 are based on the following passage. One of the most exciting races ever run is now in progress between doctors fighting malaria(疟疾)and mosquitoes. According to the most recent counts 225 million people a year suffer attacks of malaria and more than two million die. Public health workers around the world are doing all t11ev can to destroy malaria before the mosquitoes that pass on the disease become resistant to the poisons now used against them. It’s a race against time and against difficulties，with millions of lives in danger and the chances of winning not in man’s favour. Malaria，it is true，has been practically wiped out in thirteen countries. including the United States，and is under attack in many others. But it is equally true that in some parts of the world certain types of malaria-carrying mosquitoes have already learned to resist some of the sprays that formerly killed them. Other types of mosquitoes are not killed as quickly by present sprays as they once were. The World Health Organization is helping national governments to get rid of malaria before resistance among the mosquito population becomes so great that new poisons will have to be found to replace those in use at present. Most of the countries in the world have started，or are planning，campaigns against mosquitoes. If the race against resistance is won by man，it is possible that ten years from now dais old evil will have disappeared completely from the America，perhaps from the world. Which of the following statements is NOT mentioned in the passage
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