单项选择题

A．The heart pumps blood in two directions.
B．The 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.
<上一题 目录 下一题>
热门 试题

单项选择题
A．He needs to press F7 to return to the document before he prints it.B．He has to print the document to see the page numbers.C．The printer is not working correctly.D．The numbers are on the screen but they don’t print out.
A．He needs to press F7 to return to the document before he prints it.
B．He has to print the document to see the page numbers.
C．The printer is not working correctly.
D．The numbers are on the screen but they don’t print out.
单项选择题
A．That the man rethink their plans.B．That the man see a family doctor.C．That the man see a psychiatrist.D．That the man concentrate on his studies.
A．That the man rethink their plans.
B．That the man see a family doctor.
C．That the man see a psychiatrist.
D．That the man concentrate on his studies.
相关试题