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【单选题】

Cause: Effect: The group will recommend alge as an energy investment.

A.
Shelley's strong evidence convinces the group.
B.
Students recommend an energy investment.
C.
One acre of water can produce 200 tons of algae.
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【简答题】Causes Effects 1. Concerns over global warming are increasing. 2. Engineers can capture free-flowing river energy. 3. Advocates believe in tidal power. 4. Water is more than 800 times denser t...

A.
Not all equipment is appropriate everywhere.
B.
Scientists are looking for alternative sources of energy.
C.
Protective screens need to be added to turbines.
D.
A commission has been established to study tidal power.
E.
Tidal power might be a good source of renewable energy.
F.
Energy from the tides will not be able to supply a large region.
G.
Few companies are interested in investing in tidal power in the US.
H.
Water is very powerful.