Benjamin Franklin wondered about lightning. He combined his curiosity with imagination and carried out his well-known experiment to show that lightning and an electric spark are the same thing. Curiosity and imagination are important qualities which help stimulate the discovery of new facts and advance science.

　　For example, there is an experiment on the sprouting of seeds which has been running for more than 50 years. The purpose is to determine how long a time seeds can be buried in the ground and still grow when proper conditions for growth exist.

　　Scientists such as Galileo, Louis Pasteur , and Edward Jenner were laughed at because they held theories that were not accepted. Respect for new ideas is important for continued progress in all fields of knowledge.

　　In making certain kinds of experiments in science variables are used. A variable is something which has different values under different conditions. In one type of laboratory test all the variables but the variables but one are controlled. This method of testing is called controlled experimentation.

　　答案：CABED

　　Text 7 概括大意

　　My grandfather was a teacher

　　I walked on air

　　I did it for moneys sake

　　I believed I have got it.

　　Parental disapproval of my study of music

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