下图中有____组直线互相平行．

阅读理解B
    Last Friday night l went to a great party．It was a birthday party for my teacher Mrs Brown．Students in my class all went to celebrate Mrs Brown's 40th birthday．We began to arrange(筹备)the party two weeks ago，but Mrs Brown knew nothing about it．
    We all met at a restaurant at 6：45 pm．There were 30 people．Mrs Brown's son took her to the restaurant and they arrived at seven o'clock．Just before seven，we all stayed in one room of the restaurant and made the room dark．
    When they got to the restaurant．Mrs Brown's son asked her to go into the room first．Then we all shouted．"Surprise!”
    Mrs Brown was really surprised．She jumped when she heard us．Then we sang Happy Birthday To You and she knew what was happening，We all had a great dinner and then a delicious birthday cake．
    For her birth-day,Mrs．Brown got a beautiful quilt(被子).We printed our photos on it．So it was a very special quilt．
    Mrs Brown enjoyed her evening，and we enjoyed it too．
根据材料内容选择最佳答案。

下列各项中，能说明基因和染色体行为存在平行关系的是（  ）

①基因、染色体在生殖过程中的完整性、独立性

②成对的基因、染色体都是一个来自母方，一个来自父方

③体细胞中基因、染色体成对存在，子细胞中二者都是单一存在 

④等位基因、同源染色体的分离

1998年，国务院机构改革中，几乎所有的工业专业经济部门，如电力工业部、煤炭工业部、电子工业部、中国纺织总会等都被撤销，改革取得了历史性的进步。改革最鲜明的特征是（  ）

电视剧《内阁首辅张居正》的热播带动了一大批关于明代名人张居正的历史小说流行，如《一代名相张居正》、《救时宰相张居正》等。然而，有学者指出，仅从书名就可以判断，这一批小说的作者根本不懂历史。这位学者的理由可能是