35.According to a panel of health officials, there has been a great deal of confusion in the medical profession about whether obesity is a biological disorder posing serious health risks or a condition more related to appearance than to health.(A) about whether obesity is a biological disorder posing serious health risks or a condition more related to appearance than to(B) with respect to obesity being a biological disorder posing serious health risks or if it is related more to appearance than(C) over whether or not obesity is a biological disorder posing serious health risks or it is a condition more related to appearance than to(D) about obesity and if it is a biological disorder posing serious health risks or a condition related to appearance more than to（A）(E) concerning whether obesity is a biological disorder posing serious health risks or it is a condition related to appearance more than
请问E中的it is与obesity is构成平行，it is为什么可以省略啊-- by 会员 Yyuan17 (2012/1/29 2:15:42)