在过渡期满后，大、中型工程项目施工的项目经理()由取得建造师注册证书的人员担任。
A．可以
B．必须
C．不能
D．不一定
参考答案：B
Wallace and Darwin didn't agree _____ different forms of life had begun [ ]
A. with the person whose
B. on the way in which
C. on the way which
D. to the plan to which
怎样知道我置入的图片的链接有效性？
on whose