残气量增加,一秒钟用力呼气率(FEV1%)降低()
A.肺气肿
B.支气管炎
C.哮喘
D.肺结节病
E.肺间质弥漫性肺纤维化
参考答案:A
根据提示填空:人们砍树,烧树使温室效应更严重,因为树吸收有害气体。大量砍树也导
致洪水,因为树帮助稳固土壤,下雨时土壤吸收水分。
The burning and cutting down of trees is making the greenhouse effect(66)_________because trees take in(67)_________gases.It will also cause(68)_________because trees can help(69)_________soil together,and soil(70)_________water when it rains.
货车运用限度规定,同一制动梁两端闸瓦厚度差不大()。
A.10mm
B.14mm
C.15mm
D.20mm