题目内容
（请给出正确答案）
The electric catfish has a different electric system in that______.
A．current moves from the head to the tail
B．current moves from the tail to the head
C．current moves from the left to the right
D．current moves from the right to the left
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更多“The electric catfish has a dif…”相关的问题
Which of the following statements is not true？
A．Electric fish come from different families.
B．One can get a shock by touching the electric rays in two places.
C．The electric plates in the rays are connected with the spinal cord.
D．The electric catfish is edible.
A．instruments
B．appliances
C．equipment
D．apparatuses
What are the automobile engineers trying to do？
A．Improve the batteries of electric cars.
B．Increase the number of electric cars.
C．Design a new device for electric cars.
D．Look for new ways to improve safety.
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
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
A．cover B．covered C．covering D．covers
You do not turn this sewing machine by hand.It's driven by an electric ______ .
A．car B．motor C．automobile D．bike
A．Because they had no drive and ambition.
B．Because they had no electric lighting.
C．Because they had the best sleep habits.
D．Because they had nothing to do in the evening.
