测定水中铁离子,将低价铁氧化为高价铁后加入()产生红色。(A)硫酸 (B)高锰酸钾

题型:单项选择题

问题:

测定水中铁离子,将低价铁氧化为高价铁后加入()产生红色。

(A)硫酸

(B)高锰酸钾

(C)EDTA

(D)硫氰化钾

考点:热注运行工考试中级热注运行工中级热注运行工题库
题型:单项选择题

任务型阅读。

    I asked Mom to let me cook dinner for the family last night. I told her I'd

cook something simple so she agreed.

    We usually eat Asian food like Chinese or Japanese, but I decided to make something different. I chose an Italian food-Spaghetti with meat sauce(肉羹).Spaghetti is easy to cook.

    I put enough Spaghetti for everyone in my family into a pot of boiling,

salted water.  1 let it cook for about ten minutes. But before this, I made the meat sauce.

    I want the meat sauce to be really delicious. I chopped(剁碎)an onion

into small pieces.  I fried the onion in the oil for a few minutes.

    When the onion was soft, I put some beef into the pot with the onions, and fried them together for a few minutes. Then I added some tomatoes. Finally, I added some tomato juice and let it cook on a low heat for about an hour.

    When the Spaghetti was ready, I put it into a large bowl. Then I poured the meat sauce over it.

    There was enough for everyone and we all put some cheese on top of it.  

Everyone enjoyed it and Mom said she would let me cook something else

another day.

    I'm going to read a cook book and find something really interesting to

cook.

根据短文内容,完成下列各题。

1. I want to cook something                 for my family.

2. We usually eat        food, but I decided to choose an              

food-Spaghetti.

3. I add some____ ,beef into the meat sauce and it must be______.

4. After frying beef with the onions together for a few minutes,I again added

some___    

5. Everyone in my family enjoyed the meal and I'm going to read a ____to

find something really       to cook.

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A.维生素A

B.维生素B

C.维生素C

D.维生素D

E.维生素E

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