I __________________an earlier train, So I __________________here for two hours.
A. take; am
B. took; am
C. take; have been
D. took; have been
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I’ve seen some karting races on TV but I’ve never _________.
A. have a try
B. have a go
C. had a go
D. try
测量以下那颗星的地平高度就可作为观测地点的近似地理纬度?
A. 天狼星
B. 北极星
C. 金星
D. 月球
以下哪一个不属于天球坐标系?
A. 地理坐标系
B. 地平坐标系
C. 赤道坐标系
D. 银道坐标系
下列哪些文种属于计划类文书()
A. 纲要
B. 方案
C. 要点
D. 纪要