下列造成空气污染的因素主要由物理变化引起的是 [ ]
A.节日燃放烟花爆竹产生烟尘
B.建筑施工导致尘土飞扬
C.生活垃圾的焚烧产生有害气体
D.生物的腐烂放出一氧化碳
答案:B
A.(A) Consult the waiter about the dish in question.
B.(B) Tell everyone that you have certain dietary restrictions.
C.(C) Write beforehand to say that you don’t care for some dishes.
D.(D) Keep quiet and pretend that you enjoy the food.
消化性溃疡大出血病人的护理措施不包括( )。
A.迅速建立静脉通路B.冰盐水洗胃C.应用双气囊三腔管D.暂禁食E.观察粪便颜色及量