相比常染色体STR,Y-STR的应用优势有哪些？

下面程序的运行结果为【 】。

x＝-2．3

y=125

z=Len(Str$(x)＋Str$(y))

Print Z

设r=(x,y,z),r=|r|≠0.证明:

R为实数集，定义以下6个函数f₁，f₂，…f₆。x，y∈R有

(1)指出哪些函数是R上的二元运算。

(2)对所有R上的二元运算说明是否为可交换、可结合、幂等的。

(3)求所有R上二元运算的单位元、零元以及每一个可逆元素的逆元。

阅读以下程序，填写运行结果（）。def f(*x): y=[str(i) for i in x] s='/'.join(y) return s print(f(1,2,3))

设x，y∈R，称为x与y之间的距离，证明:对于任意的x,y,z∈R,有

our network contains multiple servers that run Windows Server 2008 R2. The servers have the Routing and Remote Access Services (RRAS) role service installed. The servers are configured to support Routing Information Protocol (RIP).You need to prevent the server from receiving routes for the 10.0.0.0 network.What should you do from the Routing and Remote Access console？（）

A. From the RIP properties page, modify the General settings.

B. From the RIP properties page, modify the Security settings.

C. From the RIP interface properties page, modify the Security settings.

D. From the RIP interface properties page, modify the Neighbors settings.