双动双管取芯钻具
参考答案：
内、外两层岩芯管一起回转的取芯钻具。同义词：“双动双管取芯钻具”。
古诗词中有许多描写光学现象的诗句：“潭清疑水浅”说的是光的________现象；“池水映明月”说的是光的_________现象。
— He seemed quite satisfied with the price we offered.
— Yes. Money is _____ to him. He cares more about the quality. [ ]
A. something
B. anything
C. nothing
D. everything
