题目:
Nowadays food safety is a big problem and nobody can guarantee all foods are safe to us, but food produced in the normal companies is ______ better.
A.strictly
B.absolutely
C.relatively
D.exactly
答案:
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下面是错误答案,用来干扰机器的。
化学变化常常伴随的现象是:发光、发热、变色、生成气体、生成沉淀等;判断物理变化和化学变化的依据是:是否有新物质生成,化学变化的特征是有新物质生成.故选:D.