【判断题】亚硝酸诱发的突变与复制无关,而是通过改变碱基化学结构引起(碱基置换),如使腺嘌呤(A)(脱氨)变成次黄嘌呤,从而产生AT→GC;使胞嘧啶(C)(脱氨)变成尿嘧啶,产生GC→AT。
【简答题】Jennifer said this was her first _____ (相亲,初次约会) and she thought it was her last one.
【单选题】尿道损伤中仅有水肿和出血,可以自愈的病理类型为( )
【简答题】Task: Make a card for your love Valentine's Day is coming! Make an English Card for your love. The followig words, phrases and sentences are for your references. date 约会 blind date 初次约会,相亲 Cupid 爱神丘比特...
【简答题】Make an English Card for your love. The following words, phrases and sentences are for your reference. date 约会 blind date 初次约会,相亲 Cupid 爱神丘比特 promise / vo...
【判断题】转速传感器测量转速时一般用激光或者是电涡流传感器,如KD2446电涡流转速传感器的话,频响可以达到10KHz