①高温 ②低温 ③干燥 ④湿润 ⑤暴露空气中 ⑥隔绝空气 ⑦腌制 ⑧添加食品防腐剂( )
A：①③⑥⑦⑧
B：①④⑤⑥⑦
C：②④⑥⑦⑧
D：②③⑥⑦⑧
1.73×3.7＋1.73×6.3＋1.73
=1.73×(3.7＋6.3)
=1.73×10
=17.3
_______ plays an important part in winning the fight against the serious disease?
下列说法中，错误的是（ ）
