Turning cultivated land back into forests or pasture is a fundamental way to stem soil ______ and desertification in the long run.

A．erosion

B．depletion

C．violation

D．delusion

下列哪项化验不常见于慢性胃体胃炎

A．血清胃泌素水平降低

B．贫血多见

C．胃酸常显著降低

D．血清抗壁细胞抗体阳性

E．血清抗内因子抗体阳性