A:①②
B:①④
C:②③
D:③④
选择最佳应答语( )
“蝉噪林逾静,鸟鸣山更幽”诗名中,“蝉”和“鸟”叫声的区分根据的是声音的____不同;茂密的森林有吸声和消声的作用,是在____控制噪声。
则下列说法正确的是( )
力是一个物体对另一个物体产生了____。
She looked at his fingers with wonder as they turned each page and suddenly reached for his hand. She was amazed by his and the softness and warmth of his skin.