以挥发度递减的ABCDE五种物料分离为例，现须将ABC和DE分离，其中轻关键组分是（）
A、A
B、B
C、C
D、D
参考答案：C
An Enterprise Resource Planning(ERP)is built upon a commercial ______ that promises the seamless integration of all the information flowing through the company——financial, accounting, human resources, supply chain and customer information.
A．managememt system B．operating systemC．software package D．middleware
新生儿缺氧缺血性脑病伴有颅内出血多见于
A．适龄儿
B．足月小样儿
C．巨大儿
D．早产儿
E．足月儿
