题干

2013年5月,质检部门在湖南某县生产的大米中检测出重金属镉含量超出国家标准,“镉大米”事件引起了广泛的关注.下列相关叙述错误的是(  )

A:导致大米镉含量超标的主要原因可能是当地土壤或水体中镉污染较严重

B:大米中的镉可以通过食物链进入人体内,危害人体健康

C:土壤中的镉可被水稻吸收并转运到通过无性生殖形成的种子中

D:食用“镉大米”引起的中毒不是细菌性食物中毒

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答案(点此获取答案解析)

C

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完形填空

    A lot happened to me while I lived on Thirteenth Street. I 1 school at Miss Marie Purkins' School for Little Folks kindergarten which I loved until I broke my leg one day 2  rope. And it wasn't3  a moving rope. One of the rope ends in the playground was tied to a tree, the other end to a swing set. The kids would  4  on one side and take turns running and jumping over it. All the other kids5 the rope.

    But I had no6I was a little short and fat anyway, and I was so slow that I was once the only kid at an Easter egg hunt who didn't get a7egg, not because I couldn't find them but because I couldn't get to them 8enough. On the day I tried to jump rope but I was wearing cowboy boots to school. Like a fool I didn't9the boots to jump. My heel 10  on the rope, so I turned, fell and hurt my leg. I lay in11on the ground for several minutes while Daddy12over from his company to get me.

    I had broken my leg above the knee, and13I was growing so fast, the doctor was 14to put me in a cast up to my hip.  15  he made a hole through my ankle, pushed a stainless steel bar through it. And then he 16 it to a stainless steel horseshoe, and 17 my leg up in the air over my hospital bed. For two months, I had been lying on my 18 feeling both foolish, waiting to return to my19 . I missed my playmates so much.

    After I got out of the hospital, my folks bought me a bicycle,20I never lost my fear of riding without the training wheels. No wonder people say, "Once bitten, twice shy."