题目

一种生物个体中，如果隐性个体的成体没有繁殖能力，一个杂合子（Aa）自交，得子一代（F1）个体，在F1个体只能自交和可以自由交配两种情况下，F2中有繁殖能力的个体分别占F2总数的: A．2/3  1/9         B．1/9  2/3       C．8/9  5/6            D．5/6  8/9     答案：D   23、Jenny Gordon was a very kind and beautiful woman．Before she   1  ，many young men were in love with her．Many of them    2    to her，telling her how wonderful she was，how much they loved her and each of them wanted to be her   3  ．Jenny kept all these letters．She tied them up with a red ribbon（缎带）and put them away in an old box． She   4   read them because her husband took good care of her，however，they were a part of her   5   and she did not want to throw them away． Jenny had a   6  ，Sue．Sue was six．One day，a friend of hers was in hospital．Jenny wanted to go to see her．Of course， it was   7    to take Sue there with her．So she had to leave Sue   8    for two hours． “Now be a good girl，” she said．“Play   9   in the yard．If you need anything，go to the lady next door and she’ll   10   you．” When she returned home．she asked Sue，“Have you   11    a good girl?” “Oh，yes Mommy，” Sue said． “What did you do while I was    12   ?” Jenny asked her． “I played mailman．” Sue told her． “   13    could you play mailman，darling?” Jenny asked．“You didn’t have any letters．” “Oh，yes，I did，Mommy，” Sue said．“I   14    some in an old box upstairs．They were tied up with a red ribbon．I put one in every mailbox in the  15   ．Wasn’t I a good girl?” 1．A．died                                    B．left                                    C．married 2．A．wrote                                  B．1istened                             C．talked 3．A．classmate                            B．husband                             C．brother 4．A．always                                    B．usually                               C．never 5．A．study                                  B．life                                    C．job 6．A．daughter                              B．student                              C．pupil 7．A．helpful                          B．bad                                    C．important 8．A．asleep                               B．away                                 C．alone 9．A．slowly                              B．quietly                               C．clearly 10．A．help                                   B．teach                                 C．show 11．A．learned                              B．been                                  C．played 12．A．in                                      B．free                                   C．out 13．A．When                                B．How                                  C．What 14．A．found                                B．bought                               C．borrowed 15．A．village                                B．park                                  C．street 评卷人 得分 五、阅读理解 （每空？ 分，共？ 分）