人体的每个细胞都能进行呼吸作用,其实质是 [ ]
A.吸进氧气,呼出二氧化碳
B.吸进二氧化碳,呼出氧气
C.氧化有机物,释放能量
D.将更多能量储存在有机物中
答案:C
预防及治疗支气管哮喘的最有效药物()。
A.糖皮质激素
B.茶碱类
C.抗胆碱药
D.β2受体激动剂
E.色甘酸钠
单词拼写。(5分
小题1:E________ people are hardly ever tired.
小题2:Without my p_________, don’t touch my things
小题3:You must pay a___________ to your spelling.
小题4:She s__________ in getting a place at art school.
小题5:Raining often is the f___________ of the weather in the south.