A:贾人(gǔ) 载入(zǎi) 猿猱(róu) 巉岩 (chán)
B:饿莩(piáo) 吮吸 (shǔn) 飞湍(tuān) 嫉恨(jì)
C:喧豗(zhuó) 诅咒(zǔ) 蜕变(tuì) 呕哑(yā)
D:泥淖(nào) 木讷(nè) 纰漏(pī) 坯胎(pī)
若将浓盐酸和浓硫酸敞口放置在空气中,一段时间后,可以肯定的是( )
——Some students often drop litter carelessly in our school. What can we do?——We can _______ some signs to remind them not to do that again.