When you do exercises, your heart works better. It is able to______ more blood w
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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 |
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答案
B |
解析
B.“泵入更多的血”。 A.“产生”;C.“增加”;D.“碰,撞”。 |
举一反三
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