鉴别心源性哮喘和支气管哮喘最有意义的是()
A.端坐呼吸
B.血中BNP含量
C.干湿性啰音的多少
D.夜间呼吸困难
E.是否是受凉感冒后出现
参考答案:B
—______ is the population of China today?
—It's about one billion, three hundred million.[ ]
A. How many
B. How much
C. What
"入鲍鱼之肆,久而不闻其臭"属于()
A.适应
B.同时对比
C.继时对比
D.感觉相互作用