新生儿ABO血型不合溶血症的病因是（）
A.同族免疫性溶血
B.红细胞膜的缺陷
C.红细胞酶的缺陷
D.异常血红蛋白
E.异族免疫性溶血
参考答案：A
人工呼吸机使用不当可导致（）
A.AG增高型代谢性酸中毒
B.呼吸性酸中毒
C.代谢性碱中毒
D.呼吸性碱中毒
E.AG正常型代谢性酸中毒
A （） is a pre-contract agreement that formally establishes the intent of one party to buy products or services from another party and establishes some preliminary consideration in order to reserve resources for the anticipated contract．
A．seller initial response
B．memorandum of understanding
C．letter of intent
D．letter contract
