2024届广东金太阳8月开学联考地理试题答案

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6.D秋水仙素主要作用于有丝分裂前期,制纺锤体的形成,但不影响丝点的正常分裂,A正确由于状水仙素的使用,导致染色体数目加倍,DNA复制一次,染色体数目就加倍一次,因此,时细胞中不含单体时的染色体计数,可推测DNA复制的次数,B正确:DNA分子的复制方式为半保复制,检测DNA链上H标记出现的情况,可推测DNA的复制方式,C正确;细胞中DNA第二次复剖完成时,有一半的染色体单体带程H标记,D信误

23.答案(除注明外,每空2分,共15分)(1)煤化工企业的污水中含盐量高,含有较多的耐盐菌(2)为微生物生长提供碳源和能量稀释涂布平板法(或半故划线法独体一增大时盐的浓度①甘泊管藏(1分)()胞计数板将死活孤统计在无法收计活的数量题透析本题考查微生物的分离和排,旨在考查生的理解能思路点拔(1)从煤化王企业的生产污永中葡选耐盐菌的原因是煤化工企业的污水中含盐量高,含有较多的耐盐(2)培养基中加入葡萄糖的目的是为微生物生长提供碳源和能量;初筛培养基为固体培养基,将污水接种到固体培养基的方法是稀释涂布平板法或平板划线法;复筛培养基中未加入琼脂,因此属于液体培养基,使用液体培养基的目的是大量培养微生物,增大微生物的浓度;菌种要长期保存可采用甘油管藏的方法。(3)用显微镜观察法统计微生物数量使用的工具是血细胞计数板,该方法统计微生物的不足之处在于将死菌和活菌都统计在内,无法统计活菌的数量。

第二节读后续写( One possible version)Fliss immediately took the purse to the local police station with Molly. When they arrivedFliss tied Molly to a fireplug outside and went in herself. She handed the purse to a police officerand explained everything. Greatly touched, he shook her hand and thanked her for doing her duty,promising that he would do his best to find the owner Fliss felt reassured and went back withMolly. The next day, a journalist called to make an appointment for an interview.When the journalist came, they two were on the beach. The journalist was surprised to findthat Molly was picking up litter, following her master. Fliss told the journalist it was on the wayto collecting litter that Molly had found the purse. Hearing this, Molly stopped, wagging her tailas if she understood the whole situation. Having learned about the whole story, the journalist gotto know what they did to protect the local beach. Surprised and impressed, the journalist tooksome pictures. The next day they were on the front page of the newspaper. A minor action couldmake wonders!(162 words)

7.C【解析】每年的6月22日前后，北极圈及其以北地区出现“日不落”现象。而该摄影师6月11日就在格里姆塞岛拍摄了“日不落”现象照片，说明拍摄地位于北极圈以北。选项C正确。