下列标志表示“严禁烟火”的是（ ）
A．
B．
C．
D．
答案：C
Tom is wise than smart. Few people can solve such a problem but he can.
A．no less
B．no more
C．less
D．more
()是人体必需的微量元素之一，是构成甲状腺素的重要成分。
A．铁
B．钙
C．碘
D．钠
