催化剂为什么能加快反应速度?

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问题:

催化剂为什么能加快反应速度?

考点:甲醇装置操作工甲醇转化甲醇转化题库
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气胸量多时肺部体征可有()

A.呼吸运动减弱

B.患侧胸廓饱满

C.叩诊鼓音

D.呼吸音减弱或消失

E.呼吸运动增强

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绿脓杆菌感染

A.黄色脓性痰
B.黄绿色或翠绿色痰
C.微黄奶酪样痰
D.痰粘稠牵拉成丝
E.水样痰,内含粉皮样物

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在各种染色体结构畸变类型中,能够产生假显性效应的畸变类型为______。

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Everyone knows the smart black-and-white dog that sits on top of a red doghouse with his best friend ---- a bird called Woodstock.

Created by the American cartoonist Charles Schulz in 1950, the clever dog is loved by generations of kids and adults. He speaks more than 20 languages and appears daily in 26,000 newspapers around the world.

When Snoopy first appeared, he was no different from other pet dogs. But two years later, he had begun to speak in thought bubbles with simple words and sounds. By 1957 he could walk on two legs and was going to school with his master, Charlie Brown, who fails at just about everything. Later he learned to use the typewriter.

Snoopy has done lots of jobs. He has been a bow-tie wearing lawyer, a tennis player, an Olympic figure skater, a world famous grocery checkout clerk, a pilot and even the first astronaut on the moon.

However, Snoopy has always dreamed of being a famous writer. The beginning of his story is always, “It was a dark and stormy night…” Unfortunately for him no one has ever wanted to publish the story.

In love, Snoopy is as much of a failure as Charlie Brown is at baseball. He easily falls in love but always has his heart broken. He eats to forget, but it never works.

Snoopy is an insightful(有洞察力的), feel-good and sometimes sad dog. If you think a little about his words, you might find them full of life lessons. Among his most famous lines are “To live is to dance, to dance is to live.” And “Yesterday I was a dog. Today I’m a dog. Tomorrow I’ll probably still be a dog. Sigh! There’s so little hope for advancement.”

60. From the passage, we can learn that ________.

A. Snoopy is always a sad dog

B. Snoopy can't speak in the beginning

C. Snoopy often dreams of true love       

D. Snoopy is a real smart pet dog

61. Snoopy has done all the following jobs EXCEPT ________.

A. a lawyer               B. a player                    C. a clerk                            D. a writer

62. It can be inferred that Snoopy ________.

A. has many bird friends and relatives             B. is a well-known writer and clerk

C. has been unfortunate since it was born        D. is very popular in the whole world

63. The underlined word “advancement” in the last paragraph probably means ________.

A. success                 B. progress                   C. growth                     D. popularity

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下列储蓄存款利息所得免税的是()。

A.信用卡储蓄

B.外币储蓄

C.活期储蓄

D.教育储蓄

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