正确答案: A

为+3价

题目：科研人员最新研制成一种新型的氮化镓（GaN）晶体管，有望取代传统晶体管。氮化镓中镓元素 （ ）

解析：A

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举一反三的答案和解析：

[单选题]It was _____ he came bank from Africa that wear _________ he met the girl he would like to marry.

not until; that

[单选题]下列属于种间竞争实例的是

某培养瓶中生活的两种绿藻，一种数量增加，另一种数量减少

解析：【解析】蚂蚁取食蚜虫分泌的蜜露属于捕食，菜粉蝶幼虫与蜜蜂采食的是油菜的不同部位，不构成竞争关系；细菌与噬菌体是寄生。培养瓶中的两种绿藻构成竞争关系。所以选D 。

[单选题]绣线菊亚科植物多具瞢荚果，少为蒴果，瞢荚果由离生心皮发育而来，是初生性状(或原始性状)，蒴果由合生心皮(复雌蕊)发育而来，是次生性状(或称进化性状)。( )

正确

[单选题]根据下面内容，回答 64~67题： CWe have met the enemy，and he is ours．We bought him at a pet shop．When monkey-pox，a disease usually found in the African rain forest，suddenly turns up in children in the American Midwest，it's hard not to wonder if the disease that comes from foreign animals is homing in on human beings．“Most of the infections(感染) we think of as human infections staned in other animals，” says Stephen Morse，director of the Center for Public Health Preparedness at Columbia University．

It’s not just that we’re going to where the animals are；we’re also bringing them closer to us．Popular foreign pets have brought a whole new disease to this country．A strange illness killed Isaksen’s pets，and she now thinks that keeping foreign pets is a bad idea．“I don’t think it’s fair to have them as pets when we have such a limited knowledge of them，” says Isaksen． ‘‘Laws allowing these animals to be brought in from deep forest areas without stricter control need changing,” says Peter Schantz．Monkey-pox may be the wake-up call．Researchers believe infected animals may infect their owners．We know very little about these new diseases． A new bug(病毒) may be kind at first．But it may develop into something harmful,(有害的)． Monkey-pox doesn’t look a major infectious disease．But it is not．impossible to pass the disease from person to person． 第9题：We learn from Paragraph l that the pet sold at the shop may_____．

suffer from monkey-pox

[单选题]查道字湛然，歙州休宁人。道幼沉嶷不群，罕言笑，喜亲笔砚，文徽特爱之。未冠，以词业称。侍母渡江，奉养以孝闻。母尝病，思鳜羹，方冬苦寒，市之不 获。道泣祷于河，凿冰取之，得鳜尺许以馈，母疾寻愈。端拱初，举进士高第。寇准荐其才，授著作佐郎。淳化中，蜀寇叛，命道通判遂州。有使两川者，得道公正清洁之状以闻，优诏嘉奖。迁秘书丞，俄徙知果州。时寇党尚有伏岩彀依险为栅者，其酋何彦忠集其徒二百余，止西充之大木槽，彀弓露刃。诏书招谕之，未下，咸请发兵殄之。道曰：“彼愚人也，以惧罪，欲延命须臾尔。其党岂无诖误邪？”遂微服单马数仆，不持尺刃，间关①林壑百里许，直趋贼所。初悉惊畏，持满外向。道神色自若，踞胡床而坐，谕以诏意。或识之曰：“郡守也，尝闻其仁，是宁害我者？”即相率投兵罗拜，号呼请罪，悉给券归农。

贫甚，质女婢于人 质：人质

解析：【答案】D

[多选题]常温下，往H2O2溶液中滴加少量FeSO4溶液，可发生如下两个反应：2Fe2++H2O2+2H+＝2Fe3++2H2O 2Fe3++H2O2＝2Fe2++O2↑+2H+下列说法正确的是

在H2O2分解过程中， Fe2+和Fe3+的总量保持不变

H2O2生产过程要严格避免混入Fe2+

解析：

【解析】结合A、B两个方程式根据 氧化性、还原性强弱比较规律：得 H2O2的氧化性>Fe3+的氧化性， H2O2的还原性>Fe2+的还原性，A错；2H2O2＝2H2O+O2↑，分解过程中，Fe2+作催化剂，溶液pH值不变，B错，H2O2分解Fe3+或Fe2+作催化剂，所以总量不变。因为Fe2+可导致H2O2分解，所以H2O2生产过程要避免混入Fe2+，D正确。

【考点分析】考查氧化还原知识。