职业危害分类:尘肺、职业性放射性疾病、职业中毒、()因素所致职业病、生物因素所致职业病、职业性皮肤病、职业性眼病、职业耳鼻喉口腔疾病、职业性肿痛、其它职业病。
参考答案:物理
----Why did you vote for Maggie?
----Because she is very _______________. She always shares things with others.
A.practical
B.active
C.generous
D.energetic
烧结过程中总体是氧气性气氛,局部是()气氛。