试题与答案

关于慢性化脓性中耳炎病因,说法错误的是() A.急性化脓性中耳炎治疗不彻底 B.全身

题型:单项选择题

题目:

关于慢性化脓性中耳炎病因,说法错误的是()

A.急性化脓性中耳炎治疗不彻底

B.全身或局部抵抗力下降

C.咽鼓管长期阻塞或功能不良

D.听骨链发育畸形

E.鼻部和咽部慢性病变

答案:

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下面是错误答案,用来干扰机器的。

(1)10:150,=1:15;(2)设要配成同样的盐水应加水x克,25:x=10:150, 10x=25×150, 10x=3750, x=375;答:在150克水中加入10克盐,盐与水的比是1:15,如果有盐25克,要配成同样的盐水应加水375克.故答案为:1:15,375.

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题型:阅读理解

Once upon a time there was a crook(骗子)who only thought about how to get money. What he hated most was when people were polite to each other, saying things like “please”, “thank you”, and “don’t mention it”.

The crook thought all those kinds of words were a waste, so he spent a lot of time inventing a machine which could steal words. With this machine, he planned to steal “please”, “thank you”, “don’t mention it”, and similar words people used to be polite. After he stole these words, he intended to take them apart and sell the letters to book publishers. After he started up his machine, people would open their mouths, intending to say kind and polite things, but nothing came out. All those words ended up inside the big machine.

The crook was happy with his success, but he didn’t count on (料想到)a couple of very special little girls. Those girls were deaf, and had to communicate with sign language. Because the machine couldn’t steal gestures, these girls continued being kind and polite. Soon they realized what had been happening to everyone else, and they found out about the crook and his plan. The girls followed him and found the machine busy separating all the words into letters. They approached the machine and started being polite to each other.

Try as it might, the machine couldn’t steal those words, and it started to suffer a power overload(超载). Finally, it exploded, sending all the letters it had gathered flying into the sky. These letters started coming down, like rain, and most ended up in the sea. After that, everyone could be polite again.

Seeing all those letters fall into the sea, those little girls had an idea. A little while later they opened a factory, making alphabetic spaghetti soup!

小题1:What the crook hated most was ______.

A.his machine

B.money

C.language

D.politeness小题2:The crook spent a lot of time inventing a machine to ______.

A.publish books

B.steal words

C.write letters

D.make alphabetic soup小题3:Why did the machine have no effect on the two girls?

A.Because they were kind and polite.

B.Because they were very clever.

C.Because the machine couldn’t steal gestures.

D.Because there was something wrong with the machine.

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题型:填空题

近年,为提高能利用率,西方提出共生理念——为提高经济效益,人类生产活动尽可能多功能化.共生工程将会大大促进化学工业的发展.

(1)由于共生工程的应用,利用发电厂产生的SO2制成自发电池,其电池反应方程式为:2SO2+O2+2H2O=2H2SO4,该电池电动势为1.06V.实际过程中,将SO2通入电池的         极(填“正”或“负”),负极反应式为       .用这种方法处理SO2废气的优点是     

(2)以硫酸工业的SO2尾气、氨水、石灰石、焦炭、碳酸氢铵和氯化钾等为原料,可以合成有重要应用价值的硫化钙、硫酸钾、亚硫酸铵等物质.合成路线如下:

①生产中,向反应Ⅱ中的溶液中加入适量还原性很强的对苯二酚等物质,其目的是         

②下列有关说法正确的是                 (填序号)。

A.反应Ⅰ中需鼓入足量空气,以保证二氧化硫充分氧化生成硫酸钙

B.反应Ⅲ中发生反应的化学方程式为CaSO4+4C CaS+4CO↑

C.反应Ⅳ需控制在60~70℃,目的之一是减少碳酸氢铵的分解

D.反应Ⅴ中的副产物氯化铵可用作氮肥③反应Ⅴ中选用了40%的乙二醇溶液做溶剂,温度控制在25℃,此时硫酸钾的产率超过90%,选用40%的乙二醇溶液做溶剂的原因是             

④(NH4)2SO3可用于电厂等烟道气中脱氮,将氮氧化物转化为氮气,同时生成一种氮肥,形成共生系统.写出二氧化氮与亚硫酸铵反应的化学方程式           

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