【单选题】What is the maximum efficiency of a HAWT?
【单选题】What is the direct labor efficiency variance?
【单选题】What is said to be the best way to conserve energy nowadays?
B.
Cutting unnecessary costs.
C.
Finding alternative resources.
D.
Sacrificing some personal comforts.
【单选题】what is the labour efficiency variance?
【多选题】关于三胚层胚盘的发生,正确的是
B.
上胚层细胞增殖并通过原条在上、下胚层之间向周边迁移
C.
部分上胚层细胞迁入下胚层,与下胚层细胞一起形成内胚层
D.
部分上胚层细胞迁至上.下两胚层之间形成中胚层
【单选题】What is the “conversion efficiency” mean?
【单选题】What is the approximate efficiency of a hydroelectricity scheme?
【单选题】According to the passage, what is the purpose of training?
A.
To improve employee efficiency
B.
To spend excess capital
C.
To satisfy government requirements
D.
To please a supervisor