Scientists in Brazil have used frog skin toA．eliminate bacteria.B．treat burns.C．speed up r

________ they are observing can be tested in a practical way, scientists will use exp

A．Scientists have never been very successful in predicting the hurricanes.B．The hurric

Recently scientists have observed increased pollution in the water supply.A.LateB.LaterC.

The German football authorities will use a new resort village in Brazil as their World Cup

Scientists have long been interested in how the deaf process signed languages in the bra

Scientists measured the impact that people have on the environment using a term called car