11.What can the UV light be used for in people's daily life?
A.Attracting insects.
B.Killing viruses and bacteria.
C.Testing the fluorescent pigments.
D.Signaling the dangerous situations.
12.Where did the researchers get the water bears?
A.Under the earth.
B.Under animals'skin.
C.In the schoolyard.
D.In the lab.
13.Why can the new kind of water bears stand the UV light?
A.Their bodies can reflect the UV light.
B.They live beneath deep water with weak light.