问题
单项选择题
天文航海所采用的对时信号是：（）
A．UT0
B．UT1
C．UT2
D．UTC
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
天文航海所采用的对时信号是：（）
A．UT0
B．UT1
C．UT2
D．UTC
参考答案：B
| 根据下面方框里所给的单词填空。 | |
Kim: No. It is not 2________ marker. Mary: Is this Jenny's marker? Kim: No. It is not 3________ marker. Mary: Tom has a marker. Is this 4________ marker? Kim: No. It is not 5________ marker. Mary: Whose marker is it? It is 6________ marker. |