胎儿哪种血管内的血液含氧量最低:
A.静脉导管
B.脐动脉
C.下腔静脉
D.肺静脉
E.主动脉
参考答案:B
He is a cutler(刀具商)--_____, a man who sells knives and sharp tools.
A.in conclusion
B.in general
C.what’s more
D.that is to say
翼外肌功能亢进()
A.无开口疼痛,无压痛点
B.髁突后区明显的疼痛
C.持久性疼痛,疼痛有扳机点
D.关节区可见红肿,压痛明显,后牙稍用力即可引起关节区剧痛
E.颞下颌关节区及其周围疼痛,常伴有全身游走性、多发性关节炎,晚期可发生关节强直