The back-tracking mechanism for test results, especially tests that are costly and valuable for the diagnosis of some malignant diseases, should be improved.

对

错

对

错

ANutrient-rich.

BNutrient-poor.

CDependent.

DInterdependent.

ANutrient-rich.

BNutrient-poor.

CDependent.

DInterdependent.

A1 in two.

B25%.

C60%.

D40%.

AInsecurity.

BTerrorism.

CDisease.

DEnvironmental deterioration.

AThe company directly manages the retailers.

BThe company is trying to directly manage the retailers so that there will be no middlemen.

CThe company is now establishing the channels of distribution.

DThe company is now to get rid of the middleman.

对

错

对

错

对

错