由于水准尺刻划不精确所引起的读数误差属于系统误差。
查看答案
水准仪产生的i 角误差属于偶然误差。
A. 对
B. 错
There is a Chinese Restaurant on Fifth ____________.
A. Road
B. Way
C. Street
D. Avenue
After Twenty Years is one of the most ____________ novels written by O. Henry.
A. impressiveness
B. impressive
C. impressively
D. impressible
A ____________ threw the ball back to the players.
A. spectator
B. witness
C. watcher
D. viewer