视波长
参考答案:
沿检波器排列所见的波列上被记录的速度。时距曲线斜率的倒数。视速度通常是沿排列的方向进行测定。
It takes you half an hour ______ to work every day. [ ]
A. ride
B. to ride
C. riding
D. for riding
(1+i)(1-i)表示为a+bi(a,b∈R),则a+b=______.