食品中______的变化可加速食品的腐败变质。
A．水分
B．不饱和脂肪酸
C．色素
D．芳香物质
参考答案：A,B,C,D
Sandy talked so much about herself _______ others didn't have any time to speak at the meeting. [ ]
A. that
B. as
C. because
D. than
经三级旋风分离后烟气中的催化剂粉尘含量≤（）
A.0.2g／Nm2
B.0.2g／Nm3
C.0.5g／Nm2
D.0.5g／Nm3
