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问题 单项选择题

75岁男性，突然失语，右侧肢体偏瘫，心电图：P波消失，代之以f波，RR绝对不齐，室率120/min，心电图诊断为（）

A.房性心动过速

B.快速房颤

C.房颤伴室性期前收缩

D.室性心动过速

E.窦性心动过速

答案

参考答案：B

阅读理解与欣赏

阅读下文，回答问题。

你在伞里吗

白丽娜

　　①雨渐渐大起来。后座上的女儿，小脸紧贴着我的后背，右手穿过我的胳肢窝，擎着她那把橘红的小伞。雨砸在伞顶上，嘭嘭直响。有风，车子骑得有些吃力，那小伞也忽嗒忽嗒不甚听话，但女儿努力地擎着它，我能感觉到她的小手在我的腋窝下一次又一次用力。我问道：“你在伞里吗？”

　　②“妈妈，在！”女儿的回答响亮而干脆，那语气里的阳光，穿过这晦暗的雨幕感染着我的心。女儿今天是太高兴了——期中考试，她语文、数学都得了一百分，按照考前的承诺，我要请她吃一顿肯德基。

　　③女儿左手攥着的纸袋里，此刻就装着她小小的愿望，热乎乎的，与她热乎乎的小脸一起紧贴着我的后背。车子一颠一颠，女儿的小脸和那纸袋与我的背脊若即若离，那温暖也就一阵一阵——可就是这一阵一阵的温暖，让我寒雨里的心一阵阵颤栗！

　　④肯德基的店铺在这个城市里随处可见，但我的女儿对肯德基却一直保持着向往与好奇。去年她9岁生日那天，我第一次带她去肯德基，她用薯条蘸着番茄酱，放进嘴里小心翼翼地嚼，那满足的眼神让我几乎不敢面对……为了自己的梦想，我辞职来到这座城市快两年了，我不得不节约血汗换来的每一分钱，以应付房租、伙食费以及女儿不菲的借读费。小小的女儿，便也常常受我所累，有时一些小小的愿望都难以实现……

　　⑤雨没停，风也没停，而我们离租住的小屋还很远。我把胳肢窝里的女儿的小手夹得紧一些，想让她省些力气。与此同时，我又问了一遍：“你在伞里吗？”女儿的回答还是那一声响亮而干脆的“在”！

　　⑥到家了，我用腿撑着车，腾出左手抓住伞柄，好让女儿抽出手来。当我转过脸的刹那，我呆住了——女儿几乎全身湿透！但她微笑着，扯了扯我的上衣，又拍拍那个纸袋，紧紧地抱在胸前：“它没湿，还热着呢！

　　⑦泪水和着雨水，从我的脸上流淌下来一瞬间打湿了我的脸……（《读品》2008．1）

1．请用一句话概括这一感人故事的内容。

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2．“妈妈”两次问“你在伞里吗”，可以看出这是一个_________的妈妈；女儿两次“响亮而干脆的回答‘在’”，可以看出这是一个___________的女儿。

3．第①段中加点的词“砸”换成“落”好不好？为什么？

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4．文中第④段能否删去，为什么？

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5．你是怎样理解“泪水和着雨水，从我的脸上流淌下来一瞬间打湿了我的脸……”这句话的？

________________________________________________
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单项选择题

Questions 81-90 are based on the following passage.
It sounds like a science fiction, but researchers say it’s a scientific fact: Microscopic organisms dubbed "killer algae" are paralyzing fish with unknown toxins and then eating away at their flesh. They might be making people sick, too.
The name given to this single-cell organism, or dinoflagellate, is Pfiesteria piscimorte- literally, "fish killer. " It was discovered at North Carolina State University in 1988, but at the same time, few scientists believed in its existence, much less in its highly unusual predatory nature. But ongoing research has led to international acknowledgment of the phenomenon and, recently, research funding.
Seemingly prompted by an unknown substance secreted by fish, the aggressive creature swims into action. It sends neurotoxins into the water and air, paralyzing a fish’s nervous system, and causing it to gasp for air at the surface. Eventually the fish suffocates. The killer dinoflagellate then attaches itself to the fish and begins sucking away at its flesh. This macabre scenario may help solve several sea mysteries, such as why fishermen report seeing "fish walks" (fish trying to leave the water) and pools of dead fish with holes eaten through them.
Whether humans are affected by the dinoflagellate’s toxin remains to be seen. Researchers think it’s unlikely eating fresh fish are in danger, but anyone with frequent exposure to the creature could be in peril. Several researchers working with the algae have reported bouts of memory loss and disorientation.
To understand the killer algae further, scientists must fully characterize their toxin and determine what stimulates them to attack. They also need to know if the algae are hurting fish populations, and whether pollutants make them more likely to attack.

Which of the following questions is answered according to the information given in the passage

A．What is the toxin used by the fish killer

B．Who first discovered the organism

C．How does the fish killer paralyze fish

D．How many fishes can the organism kill each day

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