当今世界三大环境问题是:酸雨、臭氧层衰竭和温室效应.其中形成酸雨的主要原因是人们向空气中排放了大量的( )
A.SO2
B.CO2
C.CO
D.水蒸气
答案:A
I have a good friend. Her name is Yu Minghao. She has long hair and two big eyes. She is very lovely, nice and friendly. She is good at drawing and I admire her very much. She often shows me her pictures. She often wears a blue T-shirt and white trousers. She likes white very much. And she sings very well. Her voice sounds sweet and soft. She looks pretty.
Yu Minghao is my best friend. We will send emails to each other.
小题1:What does Yu Minghao look like? ___________________________________.
小题2:What is Yu Minghao like? ___________________________________.
小题3:She does well in drawing, doesn’t she? ________________________________.
小题4:What does she often wear? ______________________________________.
小题5:Her voice sounds __________ and _____________.
男性,55岁。咳嗽、痰血、体重减轻3个月。近2周出现声嘶就诊。痰脱落细胞阳性,纤维支气管镜见右肺上叶支气管口新生物致管腔完全阻塞。
随病情进展肿块增大,患者出现新的神经压迫,最可能是()
A.右膈神经
B.颈交感干
C.腋神经
D.臂丛神经
E.肋间神经