【单选题】What is the Cisco IOS default behavior for switching from the shared tree to the shortest path tree in PIM-SM operations?()
A.
immediately after receiving the first packet on the shared tree for a given (S,G)
B.
after receiving over 1 kb/s traffic onthe shared tree for a given (S,G)
C.
10 seconds after receiving the first packet on the shared tree for a given (S,G)
D.
30 seconds after receiving the first packet on the shared tree for a given (S,G)
E.
after receiving over 10 kb/s traffic onthe shared tree for a given (S,G)
【多选题】经济效果评价技术方案的盈利能力主要分析指标包括( )。
【单选题】为了保证活塞能工常工作,冷态下常将其沿径向做成( )的椭圆形。
【简答题】已知函数f(x)=(x 2 -ax)e x (x∈R),a为实数. (Ⅰ)当a=0时,求函数f(x)的单调增区间; (Ⅱ)若f(x)在闭区间[-1,1]上为减函数,求a的取值范围.
【单选题】( )被誉为“汉代第一俑”,是以古代俳优为原形塑造的陶俑。
【简答题】西方经济学中的生产要素一般被划分为 劳动 、资本、 和土地四种类型。
【判断题】文艺批评主要是对接受者有引导作用,对文艺作品和创作者来说,文艺批评没有太大意义。
【单选题】灰度直方图与图像之间的关系是()的映射关系