一般来说,某化学反应在其他条件一定时,温度升高,其反应速率会明显增加,主要原因为(

题型:单项选择题

问题:

一般来说,某化学反应在其他条件一定时,温度升高,其反应速率会明显增加,主要原因为( )。

A.反应的活化能降低
B.活化分子百分率增加
C.反应物压力增加
D.分子碰撞机会增加

考点:勘察设计行业考试勘察设计注册公用设备工程师公共基础
题型:单项选择题

阅读理解。

     Ivan Fletcher loves crazy inventions. He writes a weekly magazine column (专栏) called Unbelievable

Inventions.

     "One of my favorite inventions is the Butter Stick. It looks like a glue, but it's butter. You spread it on

the bread without using a knife," he says. "Another cool invention is Duster Slippers for pets. You put these

special shoes on your dog or cat. As the animal runs around your house, it collects dust from the floor. Very

useful!" A lot of these inventions come from Japan-the home of the crazy invention.

     Ivan says that the British also invent a lot of crazy things. "The other day I found an invention called a

Cat Seat Saver," he says. "The Cat Saver looks exactly like a sleeping cat-but it isn't real. You put it on your

seat if you have to go to the rest room. No one will sit in your seat because they think there's a sleeping cat

on it. Pretty cool!"

     However, does anyone buy these things? Yes. Lucy Wade from the shopping website crazygadgets.com

says that their customers are young, professional people.

     "They buy these small things mostly for fun," she says. "They are usually looking for a present for a

friend's birthday or a silly girl for someone they work with."

     If you have an idea for an amazing invention, send it to Lucy at lucyw@crazygagets.com.

     Fish Radio

     This useful radio is completely waterproof, so you can listen to it in the shower. Simply stick on the

bathroom wall and sing along to your favorite songs as you shower!

     Watch Your Back Mirror

     Don't get caught surfing the Internet or sending e-mails to your friends. Stick this mirror to your computer

screen and you'll be able to see when the boss is coming!

1. One of the inventions that Ivan Fletcher likes best is _____. 

A. the Fish Radio

B. the Butter Stick

C. the Watch Your Back Mirror

D. the Cat Seat Saver

2. You put the Duster Slippers _____.

A. on your pet's feet

B. on your feet

C. on your pet's head

D. on the floor

3. The Cat Seat Saver _____.

A. is a special mirror

B. is a chair for cats

C. looks like a real cat

C. collects dust from the floor

4. Why is the Fish Radio useful?

A. It is shaped like a fish.

B. It sings your favorite songs.

C. You can listen to it in the shower.

D. It is small enough to put in the bathroom.

题型:单项选择题

对于VIN诊断标准,不恰当的是()

A.VINⅡ:中度非典型增生,上皮过度增生和异型细胞的改变,占上皮下2/3

B.VINⅠ:轻度非典型增生,上皮过度增生和异型细胞的改变,局限于上皮的下1/3

C.VINⅢ:重度非典型增生,上皮过度增生和异型细胞的改变,超过上皮下2/3

D.原位癌:重度非典型增生累及上皮全层,但未穿透基底层

E.原位癌:不属于VINⅢ

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创伤愈合的类型有()()。

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处理支架压死有何措施?

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