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问题 单项选择题

关于转铁蛋白受体，下列哪项是错误的（）

A.升高，常见于缺铁性贫血和溶血性贫血

B.降低，常见于再障、慢性病贫血、肾衰竭

C.可用临床观察骨髓增生情况和治疗反应

D.一般可采用酶联免疫双抗体夹心法

E.不需要用标准曲线，即可得出结果

答案

参考答案：E

解析：转铁蛋白受体测定的参考值：以不同浓度标准品的吸光度值绘制标准曲线，通过标准曲线查出未知标本的转铁蛋白受体水平。各实验室应根据试剂说明书上的参考值进行判断。

单项选择题

治疗成年奶牛前胃弛缓或生产瘫痪，一次性静脉注射10o/oCaQ2的常用剂量为（）

A.30-50ml

B.150-200ml

C.300-400ml

D.500ml以上
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填空题



Every human being is fallible; we make mistakes. In America when a mistake has been made, it is considered fitting for the person (1) to acknowledge his or her error and to apologize to anyone who has been inconvenienced. Even (2) are expected to admit their mistakes and apologize for them. Trying to (3) a mistake and denying your guilt are considered to be indicative of serious (4) .
If you make a mistake that (5) a group of people, a public apology is considered the best method for (6) . If the mistake was a serious one, or if some people were inconvenienced more than others, then the (7) should follow the public apology with private ones to (8) .
It is especially important for executives and company heads to be able to admit their mistakes. Sometimes leaders are afraid that if they (9) , they will lose the respect of their employees. Actually (10) — if you are honest with your employees and yourself, (11) , and show that you are willing to accept blame when you make a mistake, then your employees will be (12) you. They will also be more likely to admit their own mistakes.
If you (13) one person, it is usually best to apologize to that person alone, unless your mistake (14) by a large group of people. For example, if Leonard (15) to Mr. Todd during a committee meeting, it would be (16) for Leonard to apologize to Mr. Todd at the next committee meeting. If the (17) created by the initial mistake is public, then the apology should be public. However, if Leonard raised his voice to Mr. Todd when only the two of them (18) , he may apologize privately. Notice as well (19) the apologies are. As soon as you realize you have made a mistake, you should (20) .
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