LFA-1的配体是()
A.ICAM-1
B.ICAM-2
C.VLA-4
D.ICAM-3
E.VCAM-1
参考答案:A, B, D
The elephant is drinking _________ its trunk.[ ]
A. in
B. with
C. for
下列哪一份文件能跟踪整个项目生命周期的需求?()
A.项目章程
B.需求文件
C.需求跟踪矩阵
D.项目可交付成果