真正有效的通气量是（）
A.肺活量
B.时间肺活量
C.每分通气量
D.肺总量
E.肺泡通气量
参考答案：E
— Could you tell me ______?
— I live in Liaocheng.[ ]
A: where you lived
B: where were you born
C: where you live
D: where you were born
正常情况下脾脏开始成为单一产生淋巴细胞的器官的时间是（）
A.胚胎第3个月
B.胚胎第5个月
C.胚胎第6个月
D.胚胎第7个月
E.胎儿出生时
