什么是独家授权经营？
4对等位基因的杂合体亲本AaBbCcDd与aabbccdd的亲本进行杂交，得到1000个子代，分类如下：
连锁基因之间存在干涉，干涉系数是（） ["0.1","0.2","0.3","0.4","0.5"]
Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?（） ["Exhaust and scavenging","Scavenging and compression","Ignition and expansion","Exhaust and compressio"]
工质吸热时，温度（）升高；内能增加时，温度（）升高。 ["一定；一定","不一定；不一定","不一定；一定","一定；不一定"]
4对等位基因的杂合体亲本AaBbCcDd与aabbccdd的亲本进行杂交，得到1000个子代，分类如下：
与B基因距离最近的基因是（） ["A","D","C","A或C","A或D"]
简述渠道成员选择继续参考的标准？
