27.Being sure that the wounded tiger could look after itself, the doctors it into the forest.
A.relieved B.released C.removed D.rejected
26.So many natural disasters are believed over the recent years because of the frequent unreasonable mankind activities.
A.to have come about B.to come about
C.coming about D.to be coming about
25.---How does the girl we met just now strike you?
---She is but beautiful.
A.anything B.anybody C.everything D.everybody
24.The whole team were wild with joy when their captain top in the race.
A.came up B.came out C.turned up D.went out
23.---It is said we may have got the result of the exam by the end of next month, won’t we?
---Sure. .You’ll be informed in time.
A.With pleasure B.No wonder C.It doesn’t matter D.Take your time
22.---Was your holiday trip to Europe amazing?
---Not really! But we got back safe, before the European airspace restriction caused by the Icelandic volcano ashes.
A.narrowly B.successfully C.smoothly D.thankfully
第一节:单项填空(共15小题,每小题1分,满分15分)
从A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。
21. Haitian man, according to his family, has survived four weeks under ruins since
destructive earthquake this January.
A.The; a B.The;/ C.A;/ D.A; the
34.(8分)广西省水牛研究所科研人员利用克隆胚胎冷冻技术,使一头杂交母水牛顺利产下一头冷冻胚胎移植的体细胞克隆雌性水牛犊,取名“盼盼”,它的出生经历了一个严密复杂的科学操作过程(如下图所示):
(1)当克隆牛“盼盼”性成熟后进行减数分裂,其初级卵母细胞内可以形成 个四分体。
(2)①、④过程主要采取 技术才能获得细胞群或囊胚,此时在培养液中常加入一定量的二氧化碳,其目的是 。③过程中常用方法是 。
(3)根据专家介绍,水牛克隆胚胎冷冻技术的研究成功,有利于水牛克隆技术的推广应用,其重要意义在于 (答出一点即可)。
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