(2) Northwest wind? Differences in thermal properties between land and sea (2 points)

(3) 10 per day (2 points)

(4) One (1)

(5)① China is close to Fukushima nuclear power plant 1000 km, with little impact; ② In terms of meteorology, the wind in the east of China is mainly from the northwest of Japan, and there is no atmospheric movement condition for spreading radioactive dust to China. (2 points)

Our research group mainly investigates the regional comprehensive analysis ability.

(1) Calculation of investigation area and variation of day and night length. Because Tokyo time is earlier than Beijing time 1 hour. Because the day is March 1 1 and the direct point of the sun is in the southern hemisphere, Tokyo in the northern hemisphere has short days and long nights.

(2) Investigate the climate of Japan. Affected by the East Asian monsoon, March is the winter half year, so the northwest wind prevails in Japan. This is due to the difference in thermal properties between land and sea.

(3) Check the date line. Since Beijing time is 1 1 day 13: 46, the time in the east 12 area is1/day 17: 46. So the earliest time in the world is 1 1, but in some areas it is 10. The range of March 1 1 is from 0: 00 of March 1 1 to East 12 (17: 46), which is more than 2/3, but slightly less than 3/4.

(4) Investigate the nature of seismic waves. Shear waves can only propagate in solids, so they will disappear when they meet oil. Longitudinal waves can propagate in solids and liquids, but the wave velocity will also change.