1.He can only judge has considerable knowledge of anatomy. Jack is certainly a skilled person with a knife. All the victims were from right to left was a knife injury, shows Jack is most likely left-handed, or two hands can be skilled with a knife. (Such an assumption is most likely an indirect means Mingjie Ke experienced doctors or anatomical persons). Jack may not be the individual committing the crime. Jack must have a certain physical person.He can

2.But that`s the riskiest approach, if that one ad fails, then the whole campaign fails, but if two are used, it`s more likely to achieve our sales target.