对盛有过氧化氢的试管水浴加热和加入催化剂,都能够促进其分解,下列相关的叙述正确的是(

题型:单项选择题

问题:

对盛有过氧化氢的试管水浴加热和加入催化剂,都能够促进其分解,下列相关的叙述正确的是()

A.二者的基本原理是不同的

B.前者是使过氧化氢分子的能量提高,而后者不影响过氧化氢分子的能量

C.二者都可以降低过氧化氢分子的活化能

D.酶和Fe3+的作用原理是不同的

考点:高中生物酶与ATP酶与ATP题库
题型:单项选择题

阅读理解。

    How many times have you told yourself that you can't do something? Well, probably you can do it. 

    Mary was eleven years old and she had something seriously wrong with her nervous system (神经系统).

She was not able to walk. In fact, she could hardly move. Though she believed that she had a good chance

to get well again, the doctor said that few people could come back to normal after getting this disease. The

little girl didn't give up after she heard this. When she was lying in her hospital bed,she believed that no matter

what the doctors said, her going back to school was possible. 

    She was sent to a health center. Every method was tried and none worked. However, she would not give

up. It seemed that nothing could beat her. The doctors all admired her and taught her to imagine that she could

make it. Every day Mary would lie there,doing her mental (心理的) exercise carefully.

    One day, as she was imagining her legs moving again, it seemed as if a miracle (奇迹) happened:the bed

began to move! "Look, what I'm doing! Look! I can do it! I moved!" she cried. At this moment everyone else

in the hospital was frightened. They were crying, rushing for safety. And everything was falling. It was an

earthquake. But Mary believed that she did it, just as she had never doubted that she would get well. And now

only a few years later, she's back in schoo1. You see, to such a person who can shake the earth, such a

disease is a small problem, isn't it?

根据短文内容判断正、误。 (正确的涂“A”,错误的涂“B”)

( )1. Mary Was a 12-year-old girl who was not able to move.

( )2. Though the girl was seriously ill, she believed that she would go back to school.

( )3. When Mary cried, other people in the hospital cheered for her.

(     )4. The girl was strong, so she shook the earth by herself.

(     )5. The story tells us that a strong belief (信念) can make a difference and that we should never give up.

题型:单项选择题

马克思主义教育学的基本观点是什么?

题型:单项选择题

延迟焦化装置废水中的主要污染物是()

A.油

B.硫化物

C.酚

D.氰化物

题型:单项选择题

执行新的费率标准后,商户分类为()

A.标准类

B.非标准类

C.特殊类

D.公示类

题型:单项选择题

城市旧城改造、道路拓宽要涉及大量宗地的变更,具体作业步骤包括:①确定变更范围;②对模拟地图矢量化处理;③野外实地测量;④检查出错误、进行人工修改;⑤对新测的电子地图用软件逐个检查和修改;⑥将变更的数据进行试入库。下列排序正确的是()。

A.①③②④⑥⑤

B.②③①④⑥⑤

C.①③②⑥⑤④

D.①③②⑤⑥④

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