关于血型天然抗体下列哪项是错误的()
A.大多数为冷凝集素,属于IgM
B.来自母体IgG抗体为主
C.可被相应抗原中和
D.为机体天然存在的抗体
E.不能通过胎盘
参考答案:B
They were _______ busy ______ the project ______ the time.
A.too; to discuss; to forget
B.too; discussing; to forget
C.so; to discuss; that they forgot
D.so; discussing; that they forgot
工程质量的验收均应在施工单位自行检查评定的基础上进行。( )