下列哪项不属于永久性创面覆盖物范畴
A.Integra
B.复合皮
C.Duoderm
D.自体表皮细胞膜片
E.Alloderm
参考答案:C
用NA代表阿伏加德罗常数的值,下列说法正确的是()
A.在O2参与的反应中,1 mol O2作氧化剂时得到的电子数一定是4NA
B.在标准状况下,2.24L CHCl3所含共价键数为0.4 NA
C.0.05mol 碳酸钠晶体中含离子总数大于0.15 NA
D.常温下16g O2与O3的混合气体中含氧原子数为NA
The fellow I _______ a worker was really a general manager.
A.took in
B.took down
C.took up
D.took for