单项选择题

A．Artificial hearts.
B．Telescopes.
C．Microscopes.
D．Radio telescopes.
<上一题 目录 下一题>
热门 试题

单项选择题
A．She wants the man to listen to the instructions and observe.B．She wants the man to watch while she performs the operations.C．She wants the man to ask questions so that she can help him.D．She wants the man to try to do it while she gives him instructions.
A．She wants the man to listen to the instructions and observe.
B．She wants the man to watch while she performs the operations.
C．She wants the man to ask questions so that she can help him.
D．She wants the man to try to do it while she gives him instructions.
单项选择题
A．The heart pumps blood in two directions.B．Time blood is circulated round the body in one direction only by the pumping action of the heart.C．The blood moved with a backward and forward motion.D．The heart pumps blood in all directions.
A．The heart pumps blood in two directions.
B．Time blood is circulated round the body in one direction only by the pumping action of the heart.
C．The blood moved with a backward and forward motion.
D．The heart pumps blood in all directions.
相关试题