Về điều kiện tự nhiên , kinh tế xã hội nước ta có thuận lợi khó khăn gì đối với ngành thủy sản nước ta ?

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

The difference(s) between the grand canyon and valles marineris is/are: (a) the grand canyon was formed by water, but valles marineris was not. (a) valles marineris is much longer than the grand canyon. (c) valles marineris is much wider than the grand canyon. (d) valles marineris has large volcanoes near it. all of the above

In the developed world, describe the changing role of women in agriculture.