不属于基因工程方法生产的药物是 （  ）

    Big Ben is not the name of a man. It's the name of a big clock in London. This clock has four faces. So, no matter(无论)where you stand, you can read the time on the face of Big Ben. Each face is the size of a bus. The hands are about four metres long. If you go to London, you may want to visit the Houses of Parliament(英国国会大厦). In that place you will find Big Ben sits at the top of the clock tower in the Houses of Parliament. You will probably hear it and see it. The big clock makes such a loud noise. It goes every quarter of an hour. Big Ben has been the most famous symbol(标志)of  London

a、b、c、d是四种短周期元素。a、b、d同周期，c、d同主族。a的原子结构示意图为， b与c形成化合物的电子式为  。下列比较中正确的是（ ）