When the whole Eastern Hemisphere just entered the night hemisphere, the shadow of the upright mast on a scientific research ship disappeared. Judging from this, Xiao Yan 1: scientific research ship.<

When the whole Eastern Hemisphere just entered the night hemisphere, the shadow of the upright mast on a scientific research ship disappeared. Judging from this, Xiao Yan 1: scientific research ship.

Question 1:A

Question 2:C

Question 3: A.

Question 1: Pay attention to the conditions. The eastern hemisphere is a night hemisphere, which means that this is a dichotomy, and the shadow of the mast is gone, which means that there is a direct phenomenon. Judging the latitude and longitude accordingly.

Question 2: Judging the dichotomous solar terms according to the previous conditions.

Question 3: Judging from the direction of the shadow, he is located in the North Pole.