下列生物中属于原核生物的一组是
①蓝藻 ②酵母菌 ③草履虫 ④念珠藻 ⑤水绵 ⑥青霉菌 ⑦葡萄球菌[ ]
A.①⑥⑦
B.①④⑥
C.①②③④⑤⑥⑦
D.①④⑦
答案:D
单词拼写(共10题,每小题0.5分,满分5分)
小题1:New York is famous for its s______ and Empire State Building is one of its symbols.
小题2:The 2012 Olympic Games held in London was a great event and apart from the queen almost all the members of the r______ family attended the opening ceremony.
小题3:My father always s______ the importance of working hard, which I’m fed up with.
小题4:Glasses are f______ and must be handled with great care.
小题5:Many of Charles Dickens’s novels were o______ published in serial form in magazines.
小题6:How long will the ______(注册)trade-mark remain valid?
小题7:The government has promised stricter ______(管理) of the stock market.
小题8:The sale of ice cream is ______(部分)determined by the weather.
小题9:The ancient buildings are part of the national ______(遗产)and we should preserve them.
小题10: ______ (摩擦力)against the rock, combined with the weight of the climber, caused his rope to break.
背景资料
某办公楼工程,建筑面积18500m3,现浇钢筋混凝土框架结构,筏板基础。该工程位于市中心,场地狭小,开挖土方需上运至指定地点,建设单位通过公开招标方式选定了施工总承包单位和监理单位,并按规定签订了施工总承包合同和监理委托合同,施工总承包单位进场后按合同要求提交了总进度计划,如图所示(时间单位:月),并经过监理工程师审查和确认。
合同履行过程中,发生了下列事件:
事件一:施工总承包依据基础形式、工程规模、现场和机具设备条件以及土方机械的特点,选择了挖土机、推土机、自卸汽车等土方施工机械,编制了土方施工方案。
事件二:基础工程施工完成后,在施工总承包单位自检合格、总监理工程师签署“质量控制资料符合要求”的审查意见基础上,施工总承包单位项目经理组织施工单位质量部门负责、监理工程师进行了分部工程验收。
事件三、当施工进行到第5个月时,因建设单位设计变更导致工作B延期2个月,造成施工总承包单位施工机械停工损失费13000元和施工机械操作人员窝工费2000元,施工总承包单位提出一项工期索赔和两项费用索赔。
事件三中,施工总承包单位的三项索赔是否成立?并分别说明理由。