问题 解答题

小明在学校学习了酿制甜酒的方法,就积极地在家准备制作甜酒,过程如下:

①用自来水冲洗刚煮熟的糯米至温度30℃左右;

②把霉菌碾碎,均匀地搅拌在糯米中;

③再将糯米装入敞口的器皿中;

④恒温保存15~20℃.

小明在制作过程中有一些错误,请你指出:并写明为什么这样做?

①错误:______;改正:______.

②错误:______;改正:______.

③错误:______;改正:______.

④错误:______;改正:______.

答案

(1)、在制作甜酒的过程中,要防止其它杂菌的污染,工具要保持清洁.

(2)、制作甜酒时要用到酵母菌,酒曲中的菌种主要就是酵母菌,酵母菌发酵分解有机物能产生酒精,因此在制作甜酒的时候要加入酒曲,目的是加入酵母菌.

(3)、酵母菌只有在无氧的条件下才能产生酒精和二氧化碳,因此制酒的过程要密封,隔绝空气,为酵母菌提供无氧的条件,使其发酵产生大量的酒精.

(4)、酵母菌的发酵需要适宜的温度,温度过高或过低都会影响去发酵,影响产酒.

故答案为:①错误:自来水改正:凉开水

②错误:把霉菌碾碎  改正:把酒曲(或酵母菌)碾碎

③错误:将糯米装入敞口的器皿中改正:将糯米装入密封瓶中

④错误:15~20℃改正:25~30℃

阅读理解

阅读理解。

     Jeff Keith has only one leg. When he was 12 years old, Jeff had cancer (癌症). Doctors had to cut off

  most of his right leg.

     Every day Jeff puts on an artificial leg (假腿). With the plastic artificial leg Jeff can ride a bicycle, swim,

  and play soccer. He can also run.

     Jeff made a plan with his friends who had plastic legs, too. They decided to run across America.

     When he was 22 years old, Jeff Keith ran across the United States from the east to the west. He

 started running in Boston. Seven months later, he stopped running in Los Angeles. He ran 3,200 miles.

 Jeff stopped in cities on the way to Los Angeles. In every city people gave Jeff money. The money was

  not for Jeff, but for the American Cancer Society.

     Jeff is disabled, but he can do many things. He is studying to be a lawyer (律师). Jeff says, "People can

  do anything they want to do. I want people to know that. I ran not only for disabled people. I ran for

 everybody."

1. Jeff's right leg was cut off because he had _____.

    A. TB(肺结核)          

    B. an accident

    C. cancer             

    D. a serious injury

2. From the passage we know that Boston is _____.

    A. in the west              

    B. half between the east and west

    C. near Los Angeles           

    D. in the east

3. It took Jeff _____ to run from Boston to Los Angeles.

    A. about four and a half months    

    B. over two hundred days

    C. almost twenty-five weeks      

    D. less than half a year

4. The underlined word "disabled" means _____.

    A. 优秀的                  

    B. 劳累的

    C. 残疾的                  

    D. 无能为力的

5. The fifth passage tells us that _____.

    A. people should give him more money

    B. people can do anything they want to do

    C. some disabled men will become lawyers  

    D. disabled people also can run

多项选择题