It's necessary ___ us to have healthy eating habits.[ ]
A. to
B. for
C. between
答案:B
A.SO2
B.H2O
C.NaCl
D.NaOH
小儿氯胺酮麻醉特点()
A.眼内压升高
B.可增加呼吸道分泌物
C.术后精神异常不多见
D.颅内压增高
E.静脉诱导给药可能出现呼吸抑制