根据《中国移动数字同步网设备安装工程验收规范》,通信线缆设备侧应采用()方式端接。
A.焊接
B.卡接
C.铰接
D.压接
参考答案:D
下列各项中与Graves病的发病关系最密切的是()
A.精神创伤
B.TRH(促甲状腺激素释放激素)升高
C.TSH(促甲状腺激素)升高
D.碘摄入过多
E.自身免疫
As an operating system repeatedly allocates and frees storage space, many physically separated unused areas appear.This phenomenon is called ( ) .
A.fragmentation
B.compaction
C.swapping
D.paging