铝易与空气中的氧作用生成一层牢固、致密的()。
参考答案:氧化膜
—We have both red and white wine. Do you have a(n) ________ for one or the other?
—White, please. [ ]
A. favour
B. appreciation
C. preference
D. enjoyment
急性心肌梗死4小时,最适宜的治疗方案
A.哌替啶B.静滴硝酸甘油C.射频消融治疗D.溶栓治疗E.糖皮质激素+扩血管药物静滴