哪一类简报主要反映工作动态和思想动向?()
A.专题性简报
B.综合性简报
C.会议简报
D.动态性简报
参考答案:D
When workers agree to forego leisure to undertake labor and receive wages, the term that is applied in labor supply economics is the:()
A. substitution effect.
B. income effect.
C. marginal rate of substitution.
当发现柴油机汽缸垫烧损时,应(),分析其烧损原因,
A.立即停车
B.低速运转
C.高速运转
D.正常运转