问题
选择题
The heart is believed to _____blood into veins(血管) which are netted all over the body, thus keeping a person alive. [ ]
A. give
B. donate
C. circulate
D. pump
答案
答案：D
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The heart is believed to _____blood into veins(血管) which are netted all over the body, thus keeping a person alive. [ ]
A. give
B. donate
C. circulate
D. pump
答案：D