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问题 选择题

下列描述既不属于描述物质的化学性质，也不属于化学变化的一组是（　　）

A．酒精具有挥发性，碘酒洒在衣服上，可用酒精擦洗除去

B．一氧化碳可以还原氧化铁，铁丝在氧气中燃烧生成黑色固体

C．二氧化硫具有刺激性气味，块状生石灰在空气中变成粉末

D．硫酸具有酸的通性，浓硫酸敝口放置一段时问后质量会增加

答案

A、酒精具有挥发性，为物理性质：碘酒洒在衣服上，可用酒精擦洗除去，此为溶解原理，为物理变化；

B、一氧化碳可以还原氧化铁，为化学性质；铁丝在氧气中燃烧生成黑色固体，为化学变化；

C、二氧化硫具有刺激性气味，为物理性质；块状生石灰在空气中变成粉末，因为吸收水分发生反应，为化学变化；

D、硫酸具有酸的通性，为化学性质；浓硫酸敝口放置一段时间后质量会增加，吸收水分，为物理变化．

既不属于描述物质的化学性质，也不属于化学变化的一组是A组．

故选A．

单项选择题

商业银行负债管理的重点是（）。

A.贷款管理

B.存款管理

C.证券投资管理

D.法定准备金管理
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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.

7（）

A.reflect

B.attain

C.access

D.acquire
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