题型:填空题 Computer lessons must be to students of all grades,so that they can master this modern communication and learning tool. [ ]A.avoidableB.accessible C.valuableD.acceptable 查看答案
题型:填空题 常用的局麻药在相同剂量和浓度时,它们的毒性排位哪项正确()A.丁卡因>利多卡因>普鲁卡因B.普鲁卡因>利多卡因>丁卡因C.丁卡因>普鲁卡因>利多卡因D.利多卡因>丁卡因>普鲁卡因E.利多卡因>普鲁卡因>丁卡因 查看答案