写出下列反应的化学方程式 (1)实验室制二氧化碳______; (2)用稀盐酸除

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问题:

写出下列反应的化学方程式

(1)实验室制二氧化碳______;

(2)用稀盐酸除铁锈______;

(3)为了检测CO对空气的污染情况,常需用到氯化钯(PdCl2)溶液.将CO气体通入氯化钯(PdCl2)溶液中(水也参与反应),能产生黑色金属钯、CO2和一种酸.请写出该反应的化学反应方程式______.

考点:化学反应方程式的书写文字表达式
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Some years ago I was offered a writing assignment that would require three months of travel through Europe. I had been abroad a couple of times,but I could hardly claim to know my way around the continent. Moreover, my knowledge of foreign languages was limited to a little college French.

I hesitated. How would I, unable to speak the language, totally unfamiliar with local geography or transportation systems, set up interviews and do research? It seemed impossible, and with considerable regret. I sat down to write a letter begging off. Halfway through, a thought ran through my mind: you can't learn if you don't try. So I accepted the assignment.

There were some bad moments. But by the time I had finished the trip I was an experienced traveler. And ever since,I have never hesitated to head for even the most remote of places,without guides or even advanced bookings, confident that somehow I will manage.

The point is that the new, the different, is almost scary by definition. But each time you try something, you learn, and as the learning piles up, the world opens to you.

I've learned to ski at 40, and flown up the Rhine River in a balloon. And I know I'll go on doing such things. It's not because I'm braver or more daring than others. I'm not. But I'll accept anxiety as another name for challenge and I believe I can accomplish wonders.

小题1:The author accepted the assignment because _____

A. he had never travelled abroad before

B. he hardly knew any foreign languages

C. he was familiar with any other country in Europe

D. he would learn something new and different by trying小题2:Which of the following statements is TRUE?

A. The author had been abroad only twice.

B. The author thought the trip was hard but worthwhile.

C. The author admitted that anything different was terrible.

D. The author must be good at doing research and making interviews.小题3:We can infer from the text that the author is  _____.

A.awkward

B.generous

C.stubborn

D.brave小题4:What's the best title of the text?

A.An Interesting Trip Abroad

B.My First Writing Assignment

C.Ready to Try and Challenge

D.How to Be Daring and Brave

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提高换热器传热效率的途径有哪些?

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唯物主义和唯心主义是哲学史上的两个基本派别,唯心主义者都主张()。

A.事物是感觉的集合

B.事物是理念的影子

C.意识是世界的本原

D.世界是不可认识的

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淹溺的救治原则,下列选项错误的是()

A.迅速将淹溺者救离出水

B.立即恢复有效通气

C.心肺复苏术

D.根据病情作出救治处理

E.首先考虑电击除颤

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整体悬吊系统中()

A.副钢板仅作用于承载重量加大时,平时是不作用的

B.钢板间之衬片,可吸收反弹时之作用力

C.非对称式型片状弹簧在高速时之行驶性能较差

D.中心螺丝松动或折断时外倾角会改变

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