改良生物调节器就位后磨牙区应打开()
A.2~3mm
B.3~4mm
C.4~5mm
D.5~6mm
E.6mm以上
参考答案:C
______ that a society like the National Society for the Prevention of Cruelty to Children is still needed in a civilized country
A.How does it come
B.How it comes
C.How did it come about
D.How did it come
13N-NH3进入心肌细胞的机制,下列哪项是正确的()
A.Na+-K+-ATP酶转运
B.心肌细胞主动摄取
C.自由扩散
D.心肌细胞胞饮
E.Ca2+-通道转运