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5a=b,(a、b均不为0),那么a与b成反比例.(判断对错)
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同类题2

阅读下面短文,掌握其大意,然后从各题所给的A、B、C和D项中,选出最佳选项。

          I met Mrs. Neidl in the ninth grade on a stage-design team for a play and she was one of the directors. Almost instantly I loved her. She had an unpleasant voice and a direct way of speaking,1she was encouraging and inspiring. For some reason, she was impressed with my work and me.

          Mrs. Neidl would ask me for my2. She wanted to know how I thought we should3things. At first I had no idea how to answer because I knew4about stage design! But I slowly began to respond to her5. It was cause and effect: She believed I had opinions, so I began to6them. She trusted me to complete things, so I completed them perfectly. She loved how7I was, so I began to show up to paint more and more. She believed in me, so I began to believe in myself.Mrs. Neidl's8that year was, "Try it. We can always paint over it9!"I began to take10. I had been so afraid of failing but suddenly there was no failing-----only things to be11upon. I learned to dip my brush into the paint and 12create something.

          The shy, quiet freshman achieved success that year. I was13in the program as "Student Art Assistant" because of the time and effort I'd put in. It was that year that I14I wanted to spend the rest of my life doing stage design.

          Being on that stage-design team15Mrs. Neidl changed me completely. Not only was I stronger and more competent than I had thought, but I also16a strong interest and a world I hadn't known existed. She taught me not to17what people think I should do: She taught me to take chances and not be18. Mrs. Neidl was my comforter when I was upset. Her19in me has inspired me to do things that I never imagined20.

同类题4

阅读下面的语段,回答问题。
         ①一个细菌经过20分钟左右就可一分为二;一根葡萄枝切成十段就可能变成十株葡萄;仙人掌切成几块,每块落地就生根;一株草莓依靠它沿地“爬走”的匍匐茎,一年内就能长出数百株草莓苗……凡此种种,都是生物靠自身的一分为二或自身的一小部分的扩大来繁衍后代,这就是无性繁殖。无性繁殖的英文名称叫“Clone”,音译为“克隆”。实际上,英文的“Clone”来源于希腊文“Klone”,原意是用“嫩枝”或“插条”繁殖。时至今日,“克隆”的含义已不仅仅是“无性繁殖”,凡来自一个祖先,无性繁殖出的一群个体,也叫“克隆”。这种来自一个祖先的无性繁殖的后代群体也叫“无性繁殖系”,简称无性系。
        ②自然界的许多动物,在正常情况下都是依靠父方产生的雄性细胞(精子)与母方产生的雌性细胞(卵子)融合(受精)成受精卵(合子),再由受精卵经过一系列细胞分裂长成胚胎,最终形成新的个体。这种依靠父母双方提供性细胞、并经两性细胞融合产生后代的繁殖方法就叫有性繁殖。但是,如果我们用外科手术将一个胚胎分割成两块、四块、八块……最后通过特殊的方法使一个胚胎长成两个、四个、八个……生物体,这些生物体就是克隆个体。而这两个、四个、八个……个体就叫做无性繁殖系(也叫克隆)。
       ③可以这样说,关于克隆的设想,我国明代的大作家吴承恩已有精彩的描述——孙悟空经常在紧要关头拔一把猴毛变出一大群猴子,猴毛变猴就是克隆猴。