齐留通()。
A.β-肾上腺素受体激动素
B.M胆碱受体拮抗物
C.影响白三烯的药物
D.肾上腺皮质激素类药物
E.磷酸二酯酶抑制剂
参考答案:C
解析:
[知识点] 平喘药
Long,long time ago,there was a mountain.At the top of the mountain _______ ,in which an old monk used to tell stories.
A.a temple stood
B.is there a temple
C.stood a temple
D.a temple was there
造成柴油机爆震的原因是()。
A、机油粘度低
B、供油时刻过早
C、供油肘刻过迟
D、供油量过多