每掀过一张日历，就有5万个中国娃降生在已经十分拥挤的国土上；地球每绕太阳一周，我国净增1184万人口。这表明 [ ]
①人口问题仍是制约我国经济、社会发展的主要问题之一
②我国必须坚持计划生育的基本国策
③我国人口增长已同资源利用、环境保护和生态平衡相适应
④我国人口发展具有基数大、增长速度快的特点
A．①②③
B．①②④
C．②③④
D．①②③④
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证券交易价格是通过__________得以确定的（）
A、证券商与投资者协商
B、一级市场上的公开竞价
C、证券供求双方共同作用
D、发行者与证券商协商
糖皮质激素治疗脓毒症休克的作用与下列无关的是( )
A．增强食欲，增加抵抗力
B．抑制缅胞因子，并减少致炎物质的合成与释放
C．增加心肌收缩力
D．解除血管痉挛
E．抑制血小板聚集
工业三废通常是指废水、废气、废料。( )
It has been difficult to sit on the bench the majority of my high school basketball career,to watch my team from the sideline and 36 why I am not good enough to be on the floor. 37 endless hours of work and devotion, pushing myself through drill after drill, the 38 thing I want is to be a cheerleader. The feeling of being 39 is sometimes too much and drives me to 40 on the spot. I often feel as though my efforts are wasted and my time is eaten away, devoted to 41 . It is heartbreaking to be a spectator(旁观者) for the game I love,knowing that no one has enough 42 to give me the chance to 43 on the floor. Tears well up, but I hold them back. I shouldn’t be so 44 over something so silly. Away from the game, it’s easier to put my thoughts together, 45 letting my emotions drive my reasoning. I consider 46 I am where I am. I have played football my whole life. I have a passion for the 47 and always have. There is nothing like the excitement of 48 : the swish of the net, the sweat rolling off my cheeks, even the bruises(青肿) are battle wounds worn 49 after every game. Even if I don’t play much, I participate in every 50 . I am part of a team of girls who 51 together like a family. I am there for them, 52 they are for me. Should I move on? Or should I stay with my team and pursue my passion just a little longer? The decision isn’t difficult when I consider the 53 that being a part of a team brings me --- and not just any team, 54 my team. I love basketball and my teammates. When I think about that, my view from the bench really isn’t so bad 55 .
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载脂蛋白B族中主要成分是（）
A.ApoB48
B.ApoB75
C.ApoB100
D.ApoB41
E.ApoB36