平板仪是根据( )原理测图。
A.图解法
B.正投影
C.等积投影
D.解析法
参考答案:A
An excellent teacher is believed to be one who devotes himself to the children but asks for nothing _______.
A.in return
B.in advance
C.in short
D.in turn
诺西UltraSite基站的传输单元FXCE1提供()个E1端口。
A、2
B、4
C、6
D、8