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kienthientai109
2 năm trước
cho biết tâm thất trái mỗi lần co bóp đẩy đi 70ml máu và trong 1 ngày đẩy đi được 7560l máu.a)cho biết số nhịp đập trong 1 phút,b)thời gian của 1 chu kì tim
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