肉毒病的感染途径是（）。
A.食用污染食物
B.污染伤口
C.节肢动物叮咬
D.吸入污染的空气
E.接触肉毒患者的用品
参考答案：A
下列做法或认识正确的是（ ）
A．二氧化碳是一种有毒的气体
B．厨房煤气泄漏，立即打开排气扇
C．用食醋除去水壶中的水垢
D．用硬水洗衣服比用软水效果好
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