()an electric light over the desk.
A.It existed
B.There is
C.It has
D.There has
A.It existed
B.There is
C.It has
D.There has
第1题
All was quiet the whole night _______the light noise given out by the electric fan.
A.besides
B.except that
C.beside
D.except for
第2题
All was quiet the whole night ______ the light noise given by the electric fan.
A.besides
B.except that
C.beside
D.except for
第3题
A.man
B.a man
C.men
D.the man
第4题
A.what
B.how
C.which
D.that
第5题
All was quiet the whole night _______the light noise given out by the electric fan.
A. besides
B. except that
C. beside
D. except for
第6题
The largest part of the light energy directed towards the earth is ______.
A.stored up by the plants
B.absorbed by the earth' s atmosphere
C.stored up by the animals in the form. of body fat
D.used for electric power
第7题
The main idea of the third paragraph is that ______.
A.a mature torpedo is capable of producing enough electricity to knock down a man
B.the mass of the fish decides the intensity of electric power it generates
C.the strength of shock given by a young electric ray can only light the bulb of a pocket flashlight
D.to make full use of the energy produced by electric fish, suitable wires should be available
第8题
The reason why the electric eel is able to give more powerful shock is that ______.
A.the working system of the electric plates in the eel is the most effective
B.the working system of the electric plates in the eel is far inferior to those in the torpedo
C.compared with those in the torpedo, the working system of, electric plates in the eel is more direct and efficient
D.compared with other electric fish, the eel possesses much more electric plates
第9题
Approximately how many electric cars are now on California roads?
A.200
B.2,000
C.20000
D.200000
第10题
It is known that solar power can ______ electric energy.
A.convert into
B.convert to
C.be converted into
D.be converted to
第11题
A.store
B.secure
C.provide
D.ensure