4．Fleming had been studying bacteria in his laboratory when the discovery happened.(　　)

5．During the Second World War, Fleming's discovery helped to cure plenty of people.(　　)

答案：1～5　TFTFT

(Ⅱ)Fill in the blanks according to the text.

Pioneers of Science

In the 20th century, amazing discoveries were made in medicine, communications and transport; human's knowledge of 1.the_world_and_space greatly increased.

Pioneers Discoveries/Inventions Significance

Albert

Einstein E＝mc2 It showed how a small piece of mass could produce an unbelievable amount of 2.energy.

3.Theory_of_relativity It showed even time，mass and length cha­

nge according to our experience of them.

Edwin

Hubble 4.Galaxies like our own, millions of light years away from us It proved that the universe was vastly larger than had previously been thought.

5.Alexander

Fleming Penicillin It helped to save the lives of millions.

Eckert &

Mauchly The world's first

computer It was produced to improve the 6.accuracy of the US Navy's missiles.

Percy

Spencer 7.Microwave It helps us to prepare meals in minutes.

Study­reading

Analyze the following difficult sentences in the text.

1．We started flying around the world and meanwhile, scientists figured out how to split the atom, previously thought to be the smallest particle of matter in the universe.

[句式分析]

[尝试翻译]　我们开始在世界各地飞行，同时，科学家们发现了怎样分离原子，而原子以前被认为是宇宙中最小的物质微粒。

2．He discovered small areas of mist which were in fact galaxies like our own, millions of light years away from us, which proved that the universe was vastly larger than had previously been thought.

[句式分析]　本句中有两个which，第一个which引导限制性定语从句，第二个which引导非限制性定语从句。

[尝试翻译]　他发现小的雾区实际上是像我们自己的一样的星系，离我们有几百万光年之远。这个发现证明了宇宙比我们以前想象的要大得多。

3．Without the breakthroughs of these pioneers in science and technology, whether lucky or planned, the world as we know it today would have been a completely