C．To help people make mathematics calculations.

　　D．To replace the missiles，becoming a new weapon.

　　5．Which of the following is NOT right according to the passage?

　　A．Hubble discovered our galaxy is bigger than we thought it was.

　　B．The blue mould was in fact the natural form of penicillin.

　　C．Today it's impossible to donate your heart to hospital when you die.

　　D．The first computer was difficult to program.

　　【答案】　1－5　DCABC

　　　阅读P24－P25课文，在空白处填入适当的内容(1个单词)或括号内单词的正确形式

　　It's really a dilemma for us to choose the single most important discovery of 1.________ 20th century，because so many 2.________ (amaze)discoveries were made in such a large number of scientific 3.________(area)．

　　Here are some pioneers of scientists.

　　Albert Einstein 4.________ (discover)the formula"E＝mc2" when he was taking care of his little baby.

　　Edwin Hubble discovered galaxies millions of light years away 5.________ us，and his discovery proved that the universe was vastly larger than had 6.________ (precious)thought.

　　Alexander Fleming made another finding：a kind of blue mould，later called penicillin，could be used 7.________ (kill) bacteria.

　　Eckert and Mauchly invented the world first computer so as to improve the 8.________ (accurate) of the US Navy's missiles.

　　Percy Spencer discovered microwaves quite 9.________ mistake.

　　The breakthroughs of these pioneers 10.________ (change)the world completely.

　　【答案】　1.the　2.amazing　3.areas　4.discovered　5.from　6.preciously　7.to kill　8.accuracy　9.by　10.have changed

　　 present vt.主持(电视或广播节目)；呈现，赠送