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立梯坡度一般以____度左右,上部夹角以35-45度为宜。A50B60C70D80

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The Process of MemoryI. Reasons for people's forgetfulness• Memories are (1) processes. 1. ____

II. The first stage of memory is registration• in the initial stage,information is (2) 2. ____

• Short-term memory is limited in the (3) it can store at one time. 3. ____

• Unless refreshed by (4) ,the new contents are lost. 4. ____