汽油酒精，顾名思义是一种汽油酒精混合物。作为一种汽车燃料，和_爱下问搜题

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问题单项选择题

汽油酒精，顾名思义是一种汽油酒精混合物。作为一种汽车燃料，和汽油相比，燃烧一个单位的汽油酒精能产生较多的能量，同时排出较少的有害废气一氧化碳和二氧化碳。以汽车日流量超过200万辆的北京为例，如果所有汽车都使用汽油酒精，那么，每天产生的二氧化碳，不比北京的绿色植被通过光合作用吸收的多。因此，可以预计，在世界范围内，汽油酒精将很快进军并占领汽车燃料市场。以下各项如果为真，都能加强题干论证，除了：

A．汽车每公里消耗的汽油酒精量和汽油基本持平，至多略高

B．和汽油相比，汽油酒精的生产成本较低，因而售价也较低

C．和汽油相比，使用汽油酒精更有利于汽车的保养

D．全世界汽车日流量超过200万辆的城市中，北京的绿色植被覆盖率较低

答案

参考答案：C

完形填空

A boy was walking home from school when he saw a large, tempting （诱人的）apple on one of the branches of an apple tree hanging out over a tall fence. The boy wasn’t much of a fruit-eater,         a bar of chocolate if given the choice,           , as they say, the forbidden fruit can be tempting. Seeing the apple, the boy wanted it. The more he looked at it, the         he felt and the more he wanted that apple.
He stood on tiptoe(脚尖),         as high as he could, but even as his tallest           he was unable to touch it. He began to         up and down, as high as he could, at the         of each jump stretching his arms to get the apple. Still it remained out of        .
Not giving up, he thought, if only he had something to         on. His school bag wouldn’t give enough height and he didn’t want to         the things inside, like his lunch box, pencil case, and Gameboy. Looking        , he hoped he might find an old box, a rock, or,         luck, even a ladder, but it was a tidy neighborhood and there was nothing he could use.
He had tried everything he could think to do.         seeing any other choices, he gave up and started to walk        . At first he felt angry and disappointed thinking about how hungry he had become from his        , and how he really wanted that apple. The more he         like this, the more unhappy he became.
      , the boy of our story was a pretty smart guy, even if he couldn’t always get what he wanted. He started to say to himself. This isn’t        . I don’t have the apple and I’m feeling miserable as well. There’s         more I can do to get the apple—that is unchangeable—but we are supposed to be able to         our feelings. If that’s the case, what can I do to feel better?

单项选择题

诊断恶性肿瘤的依据是：（）

A.恶病质

B.局部淋巴结肿大

C.肿块增大快

D.细胞异型性明显

E.局部红、肿、痛