The best way both for reading and for writing is to________．
A. sit facing the light
B. 1et the light shine from your back
C. sit with your right side towards the light
D. have the light come from your left
查看答案
A.wentB.cameC.reachedD.got
A. went
B. came
C. reached
D. got
A.keepB.makeC.getD.have
A. keep
B. make
C. get
D. have
共轭效应
A. 东莨菪碱＜莨菪碱
B. 顺-10-羟基二氢去氧可待因＞反-10-羟基二氢去氧可待因
C. 小檗碱＞吗啡
D. 秋水仙碱＜吗啡
E. 麻黄碱＞去甲麻黄碱 说明由下列原因造成碱性不同的生物碱
应急处理首选
A. 服用消炎止痛药
B. 根尖区牙龈切开引流
C. 针刺止痛，并用氢氧化钙直接盖髓安抚
D. 去腐、开髓，置氧化锌丁香油棉球安抚镇痛
E. 去除病髓后开放引流
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