可治疗支气管哮喘的拟肾上腺素药物是
A.氨茶碱B.去甲肾上腺素C.甲氧明D.异丙肾上腺素E.多巴胺
参考答案:D
–Does it matter if I give it up this time?
-- It ____if you do. You won’t have ______chance.
A.does; the other
B.does ; second
C.does matter; another
D.does matter; the other
作物或昆虫的某一生育期或全部生育期中有效温度的总和称为()。