Anti－microbial substances in fermented foods cause acidity.A．TrueB．False

We live in a society in which the medicinal and social use of substances （drugs) is p

A tough anti-smoking law has【D1】______ in Spain. The ban—one of the strictest in Europe— 【

The cause of the anti-government protest in Greece wasA．staff reduction plan issued by gov

The intense political situation in Thailand is mainly due toA．the anti－government"s reques

When a material burns in the air, heat is released and new substances are______.A．separate

Changing from solid to liquid, snow takes in heat from all substances near it, and this___