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当前学科：初级油品分析工考试
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已知含铁（Fe2+）浓度为1.0mg/ml的溶液，用邻二氮菲溶液法测定铁，吸收池厚度为2cm，在510nm处测得吸光度A=0.380，计算其摩尔吸光系数。铁原子量为55.85.
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The combination of horror stories about people coming over the borders and editorials about congressional inability to act made members of Congress decide the time had (1) to enact immigration reform. But supporters of reform warn the end is not here yet. The conference report must still pass both (2) of Congress, and a Senate filibuster is always a possibility. (An Immigration Reform in US)Those are the memories that should be preserved, to be remembered and relied upon when harder times take hold. Those times (3) a photographer like me will catch you at a party with a loneliness on your face that you didn’t think would show or bitterness tugging at your lips during a conversation you didn’t intend to be overheard. Well, we all slip up like this sometimes, and sooner or later we get caught with our guards (4). (Photographs vs. Reality)We noted favorable trends in the (5) East, not just the longing for peace by the Israeli and Arab peoples, but constructive actions taken by leaders in the region to breathe new life into the peace process. No one has done (6) than Prime Minister Peres to that end. His vision, his statesmanship, and his tenacity are greatly appreciated here. (Israeli Prime Minister’s Last Visit to US)You would think that when you move from two competitors in a market to just one airliner, prices would have to go (7). But I want you to keep in mind that unrestricted fares of the kind People Express offered, you know, wholesale unrestricted fares, were being eliminated and phased out anyway, because (8) were not profitable. (Expansion of Texas Air Corporation)The garment workers still have an uphill battle to (9), to secure a decent living for themselves and their children. In the year since the (10), they’ve made important strides in assuring that they get a fair shake. University students, lawyers and feminists have joined the seamstresses in their fight to set new terms at the work place. (Earthquake and New Economic Structure in Mexico)Too (11) secrets, too (12) access to secrets, too many spies, too little accountability for securing our national secrets, and too little effort given to combating the very real threat which spies represent to our national security. (US Counter-Intelligence Efforts)The timing of Kalb’s action today is likely to add to the controversy (13) government deception. And it comes at an awkward moment for the Reagan (14), just days before an important pre-summit meeting with the Soviets in Iceland and in the wake of official denials about a downed guerrilla resupply plane in Nicaragua. (Bernard Kalb and Disinformation Program)It wasn’t heroic; it was easier than to die going to the train cars. And that people (15) participated in the ghetto uprising were actually, in a sense, lucky. They had arms; they could do something about what was going on while those hundreds of thousands who were just led to the train cars were equally heroic, but their death (16) much more difficult. (Special Fighters in Warsaw During World War II)Let us assume, that a man and a woman in the same company (17) their jobs on the same day: he, because he is ill; she, because she’s about to have a child. And they return on the same day, but under the California law she gets her job back and he (18) not. Is that fair? (Maternity Leave and Job Guarantee)Today, Governor Thompson declared a number of additional community state disaster areas, setting up the first step for Federal help. The rainy (19) forecast is not of much comfort, and some weary workers and homeowners say the only thing left to do now is wait (20) the flooding passes and put everything back together again. (Flooding in Illinois and Wisconsin)
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retail翻译
火蝾螈的毒腺长在（）。