What risk may people not run in eating low-fat food? ______
A.Weight gain.
B.Loss of energy.
C.Inertia may raise your risk of several diseases.
D.Too little fat take-in.
第2题
甲型溶血性链球菌生长时,菌落周围常出现溶血环,此现象称为
A、α溶血
B、β溶血
C、γ溶血
D、δ溶血
E、ε溶血
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