用所给词的适当形式填空。
for example , with , use , examine , more than , also , on, invent , health , should
For 1 100 years , people's lives have been changed greatly by inventions. 2 , the X-ray machine
is a wonderful 3 in the medical field . It has made a great contribution to human 4 . 5 its help,
doctors can 6 the inside of their patients' bodies . It is 7 for discovering illnesses . But it 8 has
some bad effects 9 our health. So it 10 be used properly.
1.________ 2._________3._________ 4._________5. ________
6.________ 7. ________ 8. ________ 9._________10.________
