B．ooks are to mankind what memory is to the individual. They contain the history of our race, the discoveries we have made, the accumulated knowledge and experience of ages．They picture for us the marvels and beauties of nature, help us out of difficulty, comfort us in sorrow, change hours of tiredness into moments of delight, fill our minds with good ideas and happy thoughts, and lift us out of and above ourselves. And also, books can help transport us to mountains or the seashore, and visit the most beautiful parts of the earth, without fatigue, inconvenience, or expense. In a sense they give us an even more vivid idea than the actual reality. So, precious and priceless are the blessings which the books scatter around our daily paths．We walk, in imagination, with noblest spirits, through the most fascinating regions.

What the children in the mountain village need ______ good books．（ ）A. isB. areC

[主观题]—Where are________ books?—They are on the desk．

[单选题]What a bad memory I’ve got! I even forgot ______the book with me.A.to takeB

[单选题]What's happened to my library books?______________.A.I have no idea B.You b

[名词解释] 记忆性T细胞(memory T cell，Tm)

22.Ｂｙ ｗｈａｔ ｍｅａｎｓ ｄｉｄ ｓｃｉｅｎｔｉｓｔｓ ａｔ Ｕｎｉｖｅｒｓｉｔｙ Ｃｏｌｌｅｇｅ Ｌｏｎｄｏｎ ｍｅａｓｕｒｅ ｍｅｍｏｒｙ ｌｏｓｓ

[单选题]Purser presents all the seaman’s books to the ________A．PilotB．Customs OfficerC．Immigration OfficerD．Agent

[单选题]You can’t borrow books from the school library _______ you get your student card.A． before B. if C. while D. as

[单选题]I didn’t expect that these few books( )to so much.A.comesB.cameC.would come

[单选题]On a(75)memory system，the logical memory space available to the program is totally independent of the physical memory space．A．cacheB．virtualC．RAMD．ROM