题目

一个男人的皮肤生发层细胞在有丝分裂后期含有DNA数目和染色体数目依次是（ ） A . 46，46 B . 92，92 C . >46，46 D . >92，92 答案：D阅读下面短文，按照句子结构的语法结构和上下文连贯的要求，在空白处填入适当的词或用括号中所给词的正确形式填空，每空不超过两个词。Halloween is a strange holiday. It started several 1.(century) ago in Europe. At that time, November 1st was called “All Saints' Day”(万圣日). People believed 2. all the spirits(灵魂) of dead people were active 3. the night of October 31st. So people would play all kinds of tricks on each other.Black is one of the 4.(tradition) Halloween colours, probably because Halloween festivals and traditions took place at night. Pumpkin is 5. symbol of Halloween, so orange 6.(become) the other traditional Halloween colour. Making lanterns out of pumpkins 7. a Halloween custom.Halloween is great fun for children. They dress up as ghosts(鬼) or witches(女巫). Small children go “Trick?or?Treating”. They wear costumes, knock on doors 8. shout “Trick or Treat！” People almost always choose 9. (give) them candy as a treat, instead of 10. (choose) to receive a trick from the children. Adults sometimes “trick or treat” their friends, too. Usually the “treat” is a glass of wine or some small gifts.