Drug taking and gambling affect all_________of family life.We should stay away from them since young.

A．strengths

B．directions

C．aspects

D．advantages

厨房中发生的下列现象属于物理变化的是（　　）

A．食盐结块、发面

B．煤与煤气在燃烧

C．菜被炒焦发黑

D．瓷碗摔碎、切菜