2.对下列生物特征的叙述,正确的是 ( )
①酵母菌 ②乳酸菌 ③硝化细菌 ④衣藻 ⑤金鱼藻
⑥烟草花叶病毒
A.①②⑥都是原核生物,且都能发生突变
B.①②③都不含叶绿素,且都是分解者
C.①③都是异养生物,且都能进行有氧呼吸
D.③④⑤都具有细胞结构,且都有细胞壁
解析:A错误:①酵母菌是真核生物,⑥烟草花叶病毒不是细胞生物;B错误:③硝
化细菌是生产者;C错误:③硝化细菌能将无机物合成有机物,是自养生物。
答案:D
1.(2010·广州模拟)浒苔是一种绿藻,奥运会前大量出现在青岛奥帆赛水域,而2007 年引起太湖水华的是蓝藻。下列有关绿藻和蓝藻的叙述正确的是 ( )
A.蓝藻是好氧藻类,其生命活动所需的能量主要由线粒体提供
B.蓝藻属于生态系统中的生产者,光合作用的场所是叶绿体
C.两者均含有叶绿素,但后者没有叶绿体
D.两者均能进行光合作用,但前者没有线粒体
解析:蓝藻属原核生物,没有线粒体、叶绿体,但具备光合作用所需的色素和酶,
能进行光合作用,在生态系统中属于生产者。绿藻为真核生物,有线粒体、叶绿
体。
答案:C
第二节:书面表达(满分25分)
假如你的名字是李华,最近你听到有关我国部分地区许多希望学校被荒废的新闻报道后,很是伤心。于是,你决定向一家英文报社写一封信,表达你的看法,内容包括:
◆希望学校对我国教育的贡献;
◆荒废的原因:缺乏规划和预测、社会的发展变化等;
◆如何处理荒废的学校。
注意:1.词数120左右;
2.可以适当增加细节,以使行文连贯充实;
3.文章的开头与结尾已经给出(不包括在词数内)。
Dear Sir/Madam,
Recently I have heard about some news that many Project Hope Schools in many areas have been deserted.
Sincerely yours,
Li Hua
参考范文:
Dear Sir/Madam,
Recently I have heard about some news that many Project Hope Schools in many areas have been deserted. At the news I feel very sad. After all, these Project Hope Schools increase children's chances of going to school and play an important part in improving the local people's level of education and thus further their quality of life.
Why are they deserted? On the one hand, before these schools began to be built, there was a lack of scientific longterm planning and predictions of the development of Chinese education.Therefore, the distribution of schools isn't reasonable. On the other hand, owing to the social development and the declining population, it's unnecessary for so many schools to exist.
So when we build schools, we must be aware of their development in the future and consider whether there's a longterm need. And for those deserted schools, they should be made the best of and continue to serve the local areas.
Sincerely yours,
Li Hua
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com