There are many books _____ our school library. [ ]
A. next to
B. in
C. behind
D. under
答案:B
一甲亢病人,基础代谢率控制欠佳,为避免入手术室病人过于紧张而诱发,应加大术前用药即鲁米那和阿托品剂量。()
分馏塔冲塔时,汽液相不再传质传热,造成塔内分馏效果严重变坏。