→ milletshw: D是開放式循環 03/09 21:01
→ garytajen: 答案是蚯蚓>"< 03/09 21:58
推 matt7618: a會先經過皮膚，b不用肺，而且是單循環 03/09 22:14
推 janet0305: 蚯蚓沒有肺 應該是青蛙吧 03/09 23:13
→ garytajen: 可是答案是蚯蚓 03/10 11:30
In which animal does blood flow from the pulmonary circulation to the heart be
fore circulating through the rest of the body?
A)frog
B)fish
C)earthworm
D)clam
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