1.   The heavy oceanic lithosphere descends into the mantle, beneath the lighter continental lithosphere.

a. + lithosphere >>共 11
oceanic 60.00%
continental 14.00%
thick 6.00%
descending 4.00%
downgoing 4.00%
dense 2.00%
denser 2.00%
heavy 2.00%
lighter 2.00%
overlying 2.00%
oceanic + n. >>共 78
lithosphere 18.87%
crust 17.61%
trench 4.40%
island 3.77%
plate 2.52%
condition 1.89%
bird 1.89%
research 1.89%
administration 1.26%
current 1.26%
每页显示:    共 30