题目内容

由于水准尺刻划不精确所引起的读数误差属于系统误差。

A. 对
B. 错

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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

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