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问题 选择题

根据下 * * 个反应的化学化学方程式，判断下列关系式不正确的是

(1)I2＋SO2＋2H2O===H2SO4＋2HI    (2)2FeCl3＋2HI===2FeCl2＋2HCl＋I2

(3)2FeCl2＋Cl2===2FeCl3               

 

A．氧化性：Cl2>Fe3＋>I2>H2SO4

B．还原性：SO2>I－>Fe2＋>Cl－

C．2Fe＋3I2===2FeI3

D．FeI2＋Cl2===FeCl2＋I2(Cl2不足时)

答案

答案：C

题目分析：C项：氧化性：Fe3＋>I2，应生成FeI2，故错。故选C。

点评：本题考查氧化还原反应，明确还原剂、氧化剂中元素的化合价变化是解答本题的关键，并熟悉常见的氧化还原反应来解答。

单项选择题

男性，40岁，8个月前行二尖瓣机械瓣置换术，1个月来发热，体温37.5～38.5℃。化验Hb 82g/L，尿RBC 5～6个/HP，血培养结果未回报。治疗应首选哪种药物

A．青霉素

B．链霉素

C．头孢菌素

D．两性霉素
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单项选择题

What’s your earliest childhood memory Can you remember learning to walk Or talk The first time you heard thunder or watched a television program Adults seldom (1) events much earlier than the year or so before entering school, (2) children younger than three or four (3) retain any specific, personal experiences.

A variety of explanations have been (4) by psychologists for this "childhood amnesia". One argues that the hippo-campus; the region of the brain which is (5) for forming memories, does not mature until about the age of two. But the most popular theory (6) that, since adults don’t think like children, they cannot (7) childhood memories. Adults think in words, and their life memories are like stories or (8) one event follows (9) as in a novel or film. But when they search through their mental (10) for early childhood memories to add to this verbal life story, they don’t find any that fit the (11) . It’s like trying to find a Chinese word in an English dictionary.

Now psychologist Annette Simms of the New York State University offers a new (12) for childhood amnesia. She argues that there simply aren’t any early childhood memories to (13) . According to Dr. Simms, children need to learn to use someone else’s spoken description of their personal (14) in order to turn their own short-term, quickly forgotten (15) of them into long-term memories. In other (16) , children have to talk about their experiences and hear others talk about (17) --Mother talking about the afternoon (18) looking for seashells at the beach or Dad asking them about their day at Ocean Park. Without this (19) reinforcement, says Dr. Simms, children cannot form (20) memories of their personal experiences.

Notes: childhood amnesia 儿童失忆症。

7（）

A.reflect

B.attain

C.access

D.acquire
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