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RBD 772
"相关结果约100,000,000个
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6,照明0.8.灯电和力电分别装表计量,试求照明与动力的进户线电流各为多少安?五、附加题(结分时参考)有一电阻元件的混联电路如上右图所示,且各元件的电阻值均为r=2ω。试求:①b、d两点间的总电阻值rbd=? (要求逐一画出简化等值图并进行计算)②你还有何种简捷方法可以求解该题?
经β丙内酯灭活病毒,保留抗原成分以诱导机体产生免疫应答,并加用氢氧化铝佐剂以提高免疫原性将新冠病毒的刺突糖蛋白基因重组到复制缺陷型的人5型腺病毒基因内,基因重组腺病毒在体内表达新冠病毒S蛋白抗原,诱导机体产生免疫应答将新冠病毒S蛋白受体结合区基因重组到中国仓鼠卵巢细胞基因内,在体外表达形成RBD...