Once Tu __8__(return) home after traveling for six months.Her little daughter didn’t recognize her and hid from the“strange woman”.To do research,Tu also had to move around a lot.
Finally,Tu found artemisinin (青蒿素) in sweet wormwood in 1971.She spent the next decades __9__(try)to improve the medicine.According to World Health Organization,about 200 million people suffer __10__ malaria around the world,and about half a million die each year.Artemisinin is still the most effective treatment against malaria known today.
Tu never complains about how hard she works.“I feel more rewarded when I see so many cured patients,” she said.
F
(2016·四川绵阳市高三二诊考试)Many teachers believe that hands-on experience is the __1__(good) way to learn.
A group of students in the United States are putting that belief to the test. They __2__ (success)
designed
and
built
a
robot
for
discovering unexplored mines __3__
the bottom of the sea. Students made the robot __4__(answer)
a challenge from the U.S. Department of Defense.
The students recently tested the underwater vehicle __5__(call) PerseusⅡ in a 95-meter-long tank of water at the Stevens Institute of Technology.
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