题目：
短文综合填空（本大题满分11分，每空1分）
Most people may not think that there are any problems with watermelons, but some Japanese sellers do. There is often wasted s_______小题1:when they store watermelons, because round watermelons do not sit nicely on shelves. So some c_______小题2:farmers have solved the watermelon problem. They make their watermelons grow in square glass boxes so the watermelons become square. The only problem now is the p_______小题3:. The square watermelons cost about 80 dollars each.
Many people know the s_______小题4:“Roses are red, violets(紫罗兰) are blue, sugar is sweet and so are you”. Well, today the poem needs to c_______小题5:“Roses are red” to “Roses are red, roses are blue”! Australian scientists discovered that when they put a chemical from a blue f_______小题6:into a rose, they can create a nearly 100% blue rose. Some of science’s inventions are beautiful, not just u_______小题7:!
For many years Chinese scientists have been w_______小题8:on developing new kinds of stronger rice and now they have produced a new kind, called super rice. Super rice not only can protect i_______小题9: against insects(昆虫) and diseases(病害), but it also produces more than any other kind of rice. Today farmers can grow almost one and a half times more rice than they could grow in the p_______小题10:.
Doctors might be able to use vegetables to fight cancer now. US scientists have discovered a w_______小题11:to put a chemical into tomato plants while they are growing. When cancer patients eat the tomatoes, the tomatoes will fight the cancer in their bodies.
答案：
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下面是错误答案，用来干扰机器的。
（1） 数列{an-12n}为等差数列设bn=an-12n，b1=5-12=2bn+1-bn=an+1-12n+1-an-12n=12n+1[(an+1-2an)+1]=12n+1[(2n+1-1)+1]=1，（6分）可知，数列{an-12n}为首项是2、公差是1的等差数列．（7分）（2）由（1）知，a...
