【单选题】测试导入单选题51滴虫性阴道炎的白带特征
【单选题】No sooner ______ they started to work.
A.
had they got to the plant then
B.
had they got to the plant than
C.
had they got to the plant when
D.
they had got to the plant than
【判断题】农民为收获农作物而播种的种子是不是成本?
【简答题】在零部件自制和外购的决策中,如果零部件的需用量尚不确定,应当采用的决策方法是()。
【判断题】任何多电压等级环网中都存在循环功率。()
【单选题】在零部件自制或外购的决策中,当零部件需用量不确定时,应采用的方法是( )。