如图所示三角形截面,高为h,底为b,已知截面对y轴的惯性矩且y1∥y,距离则Iy1为()。
A.A
B.B
C.C
D.D
参考答案:C
—This camera is very similar ________ that one.
—Yes. I have some trouble ________ their differences.
A.as; telling
B.to; telling
C.to; to tell
D.with; to tell
TCP/IP参考模型中的主机-网络层对应于OSI参考模型中的( )。
A.物理层与数据链路层
B.物理层
C.数据链路层
D.网络层