项目复杂性、规模和结构的不确定性构成( )风险因素。
A.技术 B.经济C.项目 D.商业
参考答案:C
The employers often give the job to __________ they believe have work experience with a strong
sense of duty. [ ]
A. whoever
B. those who
C. who
D. whomever
如果你出现牙龈肿胀,皮下出血等症状,说明身体缺乏()。
A.维生素A
B.维生素C
C.维生素D