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【单选题】

Tidal power is a____source of energy.

A.
renewable
B.
non-renewable
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参考答案:
参考解析:
.
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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.

【单选题】Engineers want to harness the energy from the ocean.

A.
attach a horse to a carriage with a device made of leather
B.
control and use the force of something to produce power
C.
use straps to hold something in place