1 1. There is something wrong with this question. Judging from the stem, it is "a scientific research ship sailing along 30 N" 30 N does not cross the Indian Ocean and cannot be located in the Indian Ocean. Excluding the Indian Ocean, the answer can only be chosen between C and D. However, in terms of time, on the first day, the research ship saw noon (local afternoon (12), and Beijing time was 16, indicating that the location was four hours behind Beijing, and the longitude should be 60 E west longitude, which means that the next day should be15:.

12. The time difference between these two days is 30 minutes. According to the earth's rotation 15 degrees per hour, it should span 7.5 degrees to the west, and the distance is 30 7.5 ×1× cos 30 north latitude.