A generator is a machinle to()mechanical energy into electric energy.
选项:
A:
make
B:
convert
C:
do
D:
let
make
convert
do
let
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A generator is a device used to convert electrical energy to mechanical energy. ______
选项: A:正确 B:错误Which one of the following is NOT a vector quantity?
选项: A:Linear momentum
B:Electric field
C:Average velocity
D:Instantaneous acceleration
E:Kinetic energy
do
B:to do
C:doing
D:that he do
nutrients
B:amino acids
C:proteins
D:hydrochloric acids
contract
B:make friend
C:friend
D:call
on
B:in
C:for
D:about
They make jiaozi
B:They enjoy the full moon
C:They row dragon boats
D:They climb mountains
whichever
B:whatever
C:anything
D:something
(1)、How many ways of dealing with energy problems are talked about in the passage?
A:One
B:Two
C:Three
D:Four
B:(2)、We can learn from the passage that .
A:coal is a kind of renewable source
B:coal is not renewable
C:coal can be renewed with new technology
D:coal is the most common source of energy
C:(3)、Special houses are built because they .
A:can save energy
B:can prevent heat
C:can be warmer than other houses
D:can show the skills of the builders
D:(4)、According to the passage, geothermal energy .
A:is heat inside the earth
B:is the temperature of the earth
C:cannot be renewed
D:cannot be used now
E:(5)、At deep, the temperature of the earth rises to nearly 200°C?
A:One km
B:Two km
C:Six km
D:Four km
make your home attractive
B:reduce daily expenses
C:appeal to customers
D:save energy
make your home attractive
B:reduce daily expenses
C:appeal to customers
D:save energy
Getting off to work with a minimum effort helps save one's energy.
B:Dr. Kletman explains why people reach their peaks at different hours of day.
C:Habit helps a person adapt to his own energy cycle.
D:Children have energy cycles, too.
They make jiaozi.
B:They enjoy the full moon.
C:They row dragon boats.
D:They climb mountains.
A
A
B
An
C
The
D
/
on
B:in
C:about
D:on
机械的
down
B:out
C:except
D:up
benefit
B:inspect
C:respond
D:possess