全站仪是由（）、光电测距、微型机及其软件组合而成的智能型光电测量仪器。
A.水准测高
B.三角测高
C.光学测角
D.光电测角
参考答案：D
____ in the area reported _____ three people robbing the bank with their heads wrapped in stocks.
A．Witness; to look at
B．Witnesses; seeing
C．Witnesses; looking out
D．Witness; to see
什么是引文分析法？
