问题
选择题
When you do exercises, your heart works better. It is able to______ more blood while beating more slowly.
A.produce
B.pump
C.increase
D.bump
答案
答案:B
B.“泵入更多的血”。
A.“产生”;C.“增加”;D.“碰,撞”。
When you do exercises, your heart works better. It is able to______ more blood while beating more slowly.
A.produce
B.pump
C.increase
D.bump
答案:B
B.“泵入更多的血”。
A.“产生”;C.“增加”;D.“碰,撞”。