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【多选题】
下列关于人体细胞分裂和分化的叙述中，正确的是（ ）A.
细胞分裂是细胞增殖的过程，在生物的一生中，细胞分裂旺盛的时期是胚胎期和生长发育期
B.
细胞分化是细胞形态、结构、功能发生持久、不可逆、稳定性变化，形成特定组织细胞的过程，胚胎期细胞分化达到最大限度
C.
在生物的个体发育过程中，既有细胞的分裂，又有细胞的分化
D.
高度分化后的细胞结构无改变，因而具有全能性
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举一反三
【单选题】Throughout______ history, ______ English language is made up of the rules each group of people brought to Britain with them.
A.
the, the
B.
/,the
C.
the,/
D.
/,/
【简答题】空运单既非航空运输合同，也非在运货物的物权凭证，相反只是一种（）的文件。
【单选题】Historians sometimes forget that history is continually being made and experienced before it is studied, interpreted, and read. These latter activities have their own history, of course, which may imp...
A.
occurrence of events extremely similar to past events.
B.
history of the activities of studying, interpreting, and reading new historical writing.
C.
change in people's understanding of the past due to more recent historical writing.
D.
overturning of established historical interpretations by politically motivated politicians.
E.
difficulty of predicting when a given historical interpretation will be overturned .
【简答题】某家用电器商场为增值税一般纳税人。2018年3月份发生如下经济业务: (1)销售特种空调取得含税销售收入160000元,同时提供安装服务收取安装费20000元。 (2)销售电视0台,每台含税零售单价为2400元;每售出一台可取得厂家给与的返利收入200元。 (3)代销一批数码相机并开具普通发票,企业按含税销售总额的5%提取代销手续费15000元,当月尚未将代销清单交付给委托方。 (4)当月该商...
【简答题】请从H、He、O、C、Cl、Na、Ca等几种元素中选择适当元素，按要求填空： （1）写出下列粒子符号．①2个氯原子______；②3个氢氧根离子______． （2）从氦气、二氧化碳、生石灰、盐酸、纯碱中选出相应物质填写化学式． ①可用作干燥剂的是______；②可用作洗涤剂的是______； ③可用作灭火剂的是______；④可用作焊接金属保护气的是______．
【单选题】What made the history lecture so interesting?
A.
It was about American women instead of the American revolution,
B.
The professor talked about a trip and he was challenged.
C.
The professor made a good speech.
D.
The professor was challenged by a student by his lack of knowledge of female historical character.
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