什么是水蚀?

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问题:

什么是水蚀?

考点:汽轮机检修汽轮机运行与检修汽轮机运行与检修题库
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Reading is the key to school success and,like any skill,it takes practice. A child learns to walk by practicing until he no longer has to think about how to put one foot in front of the other. An excellent sportsman practices until he can play quickly, correctly and without thinking. Educators call it “automaticity(自动性)”.

A child learns to read by sounding out the letters and finding the meaning of the words. With practice, he stumbles less and less, reading by the phrase. With automaticity, he doesn’t have to think about the meaning of words, so he can give all his attention to the meaning of the text.   

It can begin as early as first grade. In a recent study of children in Illinois schools, Alan Rossman of Northwestern University found that automatic readers in the first grade not only read almost three times as fast as the others, but also got better results in exams.

According to Rossman, the key to automaticity is the amount(数量)of time a child spends reading, not his IQ. Any child who spends at least 3.5 to 4 hours a week reading books, magazines or newspapers will probably reach automaticity. It can happen if a child turns off TV just one night for reading at home.

You can test yourself by reading something new which is suitable for your level. If you read aloud with expression, with a sense of the meaning of the sentences, you probably are an automatic reader. If you read brokenly, one word at a time, without expression or meaning, you need more practice.

小题1:“ Reading is the key to school success” means that reading______.

A.helps school develop faster

B.is a key to a successful school

C.helps students go to a key school

D.can improve students’ learning results小题2:Children with “automaticity” can read faster because they______.

A.know how to read the words

B.do not have to think while reading

C.read by themselves without any help

D.pay attention to the meaning of the text小题3: The underlined word “stumble” in the passage means “______” in Chinese.

A.结结巴巴地读

B.全神贯注地读

C.心不在焉地读

D.声情并茂地读小题4:The best title for the passage is “______”.

A.IQ is the Key to the Automaticity

B.TV is Bad for Children’s Reading

C.Automaticity Depends on Practice

D.Automatic Readers Will Be Successful

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火柴曾经是人们日常生活中取火的重要工具,火柴盒外侧一般涂有红磷和玻璃粉,火柴头上的火药是由氯酸钾、二氧化锰和三硫化二锑(Sb2S3)组成的.划火柴时,用火柴头蹭一下盒的外侧,因摩擦生热而达到红磷的着火点,产生的火星可引燃三硫化二锑,从而使氯酸钾受热放出氧气,使火柴梗燃烧得更旺.

(1)在火柴点燃的过程中,能产生一种有刺激性气味的气体,这种气体应该是______.

(2)火柴点燃过程中有多个化学反应,请写出其中一个属于分解反应的化学方程式______.

题型:问答题 简答题

水是生命之源,是人类宝贵的自然资源,每个人都要关心水、爱护水、节约用水。

(1)我国规定生活饮用水的水质必须达到下述四项指标:

a.不得呈现异色 b.不得有异味 c.应澄清透明 d.不得含有细菌和病毒。其中“c指标”可以通过                             操作达到。“a 、b指标”可以通过加物质                                达到。

(2)生活中可以采用                     区分硬水和软水,可以通过                             的方法降低水的硬度。

(3)水的用途广泛,工农业生产生活中都要用到水,请你列举一例:                                                  

(4)下列各种水中属于纯净物的是                             (填序号)。

①矿泉水 ②自来水 ③蒸馏水 ④汽水 ⑤糖水

题型:问答题 简答题

低含硫干性天然气气体的取样,最普遍、最适宜的方法是()取气法。

A.排水

B.双瓶

C.干法

D.高压

题型:问答题 简答题

最为适宜的治疗方法是

A.加强营养,卧床休息

B.口服异烟肼1周手术治疗

C.诊断明确立即切除肾脏

D.口服异烟肼、利福平、吡嗪酰胺2周后切除患侧肾脏

E.抗结核药物治疗

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