慢性肺心病发病最主要是因为
A.吸烟
B.吸入寒冷空气
C.反复呼吸道感染
D.慢支
E.支气管扩张
参考答案:C
解析:反复呼吸道感染因增加心脏负荷而使肺心病发病。
按要求完成句子,每空一词。
小题1:A . Both he and I didn’t know what happened to the old man.(同义句转换)
B._____ __ of ______ ___ knew what happened to the old man.
小题2:She’s had this computer for a year .(改否定句)
She ___ ____ _____ ___ this computer for a year.
小题3: A. I named him Friday. (同义句转换)
B. I ____ ___ him the ___ ___ Friday.
小题4:He is the actor . He has won a lot of prizes for the work he has done.(改复合句)
He is the actor ____ ____ has won a lot of prizes for ____ ____ he has done.
小题5:Could we get something to drink after the movie?(作否定回答)
______ _____, _____ ____ , ______ ____.
已知函数f(x)=loga(2+x)-loga(2-x)(a>0,a≠1),设f(x)的反函数为f-1(x).若关于x的不等式f-1(x)<m(m∈R)有解,则m的取值范围是( )
A.m>-2
B.m>2
C.-2<m<2
D.随a的变化而变化