题目内容

下列各指示液分别与哪些滴定方法相对应 铈量法

A. 酚酞
B. 碘化钾-淀粉
C. 溴麝香草酚蓝
D. 结晶紫
E. 邻二氮菲

查看答案
更多问题

Years ago, Charlie, a highly respected orthopedist and a mentor of mine, found a lump in his stomach. He had a surgeon explore the area, and the diagnosis was pancreatic cancer. He went home the next day, closed his practice, and never set foot in a hospital again. He focused on spending time with family and feeling as good as possible. Several months later, he died at home. He got no chemotherapy, radiation, or surgical treatment. Medicare didn’t spend much on him.It’s not a frequent topic of discussion, but doctors die, too. And they don’t die like the rest of us. What’s unusual about them is not how much treatment they get compared to most Americans, but how little. Of course, doctors don’t want to die ; they want to live. But they know enough about modern medicine to know its limits. Almost all medical professionals have seen what we call "futile care" being performed on people. That’s when doctors bring the cutting edge of technology to bear on a grievously ill person near the end of life. The patient will get cut open, perforated with tubes, hooked up to machines, and assaulted with drugs. I cannot count the number of times fellow physicians have told me, in words that vary only slightly, "Promise me if you find me like this that you’ ll kill me. "How has it come to this—that doctors administer so much care that they wouldn’t want for themselves The simple, or not-so-simple, answer is this: patients, doctors, and the system.To see how patients play a role, imagine a scenario in which someone has lost consciousness and been admitted to an emergency room, and shocked and scared family members find themselves caught up in a maze of choices. When doctors ask if they want "everything" done, they answer yes. Then the nightmare begins. Feeding into the problem are unrealistic expectations of what doctors can accomplish. For example, many people think of CPR as a reliable lifesaver when, in fact, the results are usually poor.But of course it’s not just patients making these things happen. Doctors play an enabling role, too. The trouble is that even doctors who hate to administer futile care must find a way to address the wishes of patients and families. Imagine, once again, the emergency room with those grieving family members. They do not know the doctor. Establishing trust and confidence under such circumstances is a very delicate thing. People are prepared to think the doctor is acting out of base motives, trying to save time, or money, or effort, especially if the doctor is advising against further treatment.It’s easy to find fault with both doctors and patients in such stories, but in many ways all the parties are simply victims of a larger system that encourages excessive treatment. In some unfortunate cases, doctors use the fee-for-service model to do everything they can, no matter how pointless, to make money. More commonly, though, doctors are fearful of litgation and do whatever they’re asked to avoid getting in trouble. It can be known from the text that relatives of patients usually ()

A. put excessive emphasis on medical treatment
B. have a good understanding of medical treatment
C. have a deep faith in doctors’ professional advice
D. can not think rationally when it comes to saving their loved ones’ lives

"What About the Men" was the title of a Congressional briefing last week timed to (1) National Work and Family Month. "What about them " you may be (2) to yell.When Ellen Galinsky, president of the Families and Work Institute, first went out on the road to talk about her organization’s research into men’s work-family (3) , she received many such grumpy responses. Work-life experts laughed at her. Men are (4) , they said. They don’t have the right to complain. That was in 2008, before the Great Recession had hit. And this year, when Galinsky went out on the road again to talk about the results of a new study on male work-life conflict, she got a very (5) response. Some men became very (6) . They felt they didn’t have permission to feel (7) . "’This is what I think about each and every day, ’ " she recalled another man telling her. " ’ I didn’t realize that anyone else did, ’ " he said. "He thought he was alone, " Galinsky told me.(8) men are (9) work-family conflict isn’t new. Indeed, it’s been some time now that they—and younger men in particular—have been complaining of feeling the (10) in even greater numbers of women. Failure, (11) , uncertainty, the (12) that comes from spending a lifetime playing one game (13) , mid-way through, that the rules have suddenly changed, seem to have (14) the old categories of self, work and meaning for many men.Is this a bad thing I’d rather see it as a moment ripe (15) possibility. "A new beginning, " said Ellen Galinsky. After all, what men are starting to say sounds an awful lot like the conversational stirrings that (16) the way for the modern women’s movement.For some years now, sociologists have been tracking the patterns of what they call (17) in men and women’s lives. Mostly, when we think of this, we tend to focus (18) how they live, what they do, spend their time, whether they do or do not empty the dishwasher or care for their children. But what about how they feel Now that this final frontier is being breached, I wonder if we aren’t fully prepared to see more meaningful change in men’s—and women’s and families ’ —lives than ever before. That is: if we can (19) the change and act (20) it with courage, not fear. 16()

A. laid
B. cleared
C. paved
D. set

"What About the Men" was the title of a Congressional briefing last week timed to (1) National Work and Family Month. "What about them " you may be (2) to yell.When Ellen Galinsky, president of the Families and Work Institute, first went out on the road to talk about her organization’s research into men’s work-family (3) , she received many such grumpy responses. Work-life experts laughed at her. Men are (4) , they said. They don’t have the right to complain. That was in 2008, before the Great Recession had hit. And this year, when Galinsky went out on the road again to talk about the results of a new study on male work-life conflict, she got a very (5) response. Some men became very (6) . They felt they didn’t have permission to feel (7) . "’This is what I think about each and every day, ’ " she recalled another man telling her. " ’ I didn’t realize that anyone else did, ’ " he said. "He thought he was alone, " Galinsky told me.(8) men are (9) work-family conflict isn’t new. Indeed, it’s been some time now that they—and younger men in particular—have been complaining of feeling the (10) in even greater numbers of women. Failure, (11) , uncertainty, the (12) that comes from spending a lifetime playing one game (13) , mid-way through, that the rules have suddenly changed, seem to have (14) the old categories of self, work and meaning for many men.Is this a bad thing I’d rather see it as a moment ripe (15) possibility. "A new beginning, " said Ellen Galinsky. After all, what men are starting to say sounds an awful lot like the conversational stirrings that (16) the way for the modern women’s movement.For some years now, sociologists have been tracking the patterns of what they call (17) in men and women’s lives. Mostly, when we think of this, we tend to focus (18) how they live, what they do, spend their time, whether they do or do not empty the dishwasher or care for their children. But what about how they feel Now that this final frontier is being breached, I wonder if we aren’t fully prepared to see more meaningful change in men’s—and women’s and families ’ —lives than ever before. That is: if we can (19) the change and act (20) it with courage, not fear. 1()

A. commemorate
B. memorize
C. remember
D. memorial

以下杂质检查方法所用的试剂是 铁盐的检查

A. 氯化钡试液
B. 酸性氯化亚锡试液
C. 硫酸
D. 硫氰酸铵溶液
E. 硫酸肼溶液

答案查题题库