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题库 / OG2017V-SC-269
Geologists believe that the warning signs for a major earthquake may include sudden fluctuations in local seismic activity, tilting, and other deformations of the Earth's crust, changing the measured strain across a fault zone, and varying the electrical properties of underground rocks.
changing the measured strain across a fault zone, and varying
changing measurements of the strain across a fault zone, and varying
changing the strain as measured across a fault zone, and variations of
changes in the measured strain across a fault zone, and variations in
changes in measurements of the strain across a fault zone, and variations among
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