SDH管理网的传送链路是（）。
A、DCC通路
B、FCC通路
C、KCC通路
D、E1字节
参考答案：A
下列物质中，不属于激素的是（）。
A.肝素
B.肾素
C.维生素D3
D.促胰液素
E.促红细胞生成素
He had to put his shoes lightly, _____ he? [ ]
A. didn't
B. did
C. had
D. hadn't
