某化学兴趣小组在做铁与硫酸铜溶液反应时，发现生成铜的同时也有少量气泡产生，为了进一步研究做了如下实验：

（1）取8.5g铁粉放入一定量的硫酸铜溶液中，反应完成后，滤过固体，洗涤，干燥后称量，固质量为9.2g

（2）将9.2g固体放一足量的盐酸中充分反应，产生氢气的质量为0.1g．

问：①与硫酸铜反应的铁的质量是______，与盐酸反应的铁的质量是______，两者质量之和______（填“＞”“＜”“=”）8.5g．

②针对上述现象请你解释原因：______．

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。

11（）

A.model

B.pattern

C.frame

D.formula