以下不属于物理访问控制要点的是（）。

A．硬件设施在合理范围内是否能防止强制入侵

B．计算机设备的钥匙是否具有良好的控制

C．计算机设备电源供应是否能适当控制在合理的规格范围内

D．计算机设备在搬动时是否需要设备授权通行的证明

The construct cobegin Statement1; Statement2; coend means Statement1 and Statement2 are to be executed in parallel. The only two atomic actions in this construct are loading thevalue of a variable and storing into a variable.For the program segment x:=0； y:=O； cobegin begin x:=l; y:=y+x; end; begin y:=2; x:=x+3; end coend Which of the following indicate(s) possible values for the variables when the segment finishes execution Ⅰ．x=1,y=2　　Ⅱ．x=1,y=3　　Ⅲ．x=4,y=6

A． Ⅰ

B． Ⅰ and Ⅱ

C． Ⅰ and Ⅲ

D． Ⅱand Ⅲ