在地下水位较低的土壤中,当降水或灌溉后,水分下移但不能与地下水联系而"悬挂"土壤上层毛管中的水分称为()
A.吸湿系数
B.最大分子持水量
C.毛管悬着水
D.全蓄水量
参考答案:C
丙烯腈的蒸汽与空气形成爆炸混合物的爆炸范围为()%(体积分数)。
A.8.15~19.2
B.3.05~17.0
C.17.05~28.3
Project () Management includes the processes required to ensure that the project includes all the work required, and only the work required, to complete the project successfully.
A.Integration
B.Scope
C.Configuration
D.Requirement