心脏复苏时最常用、效果最好的药物是（）。
A．利多卡因
B．碳酸氢钠
C．肾上腺素
D．氯化钙
E．阿托品
参考答案：C
He put a cover on his car to keep it ______dirt.
A free from B. far from C. apart from D. away from
帘线断裂
