问题 选择题

在有机化合物分子中能引入卤素原子的反应有

A.在空气中燃烧

B.取代反应

C.加成反应

D.加聚反应

答案

BC

题目分析:A选项有机物燃烧一般只会生成二氧化碳和水,不能引入卤素,故A选项是错误的。D选项加聚反应不能引入卤族元素,故答案选BC

阅读理解

根据短文内容选择正确答案。    

                                                       No More Chores, Please!

     Sam hated doing chores. And he had many chores. For example, on Mondays, Wednesdays

and Fridays he took out the trash. And on the weekend he always washed his father's car. He also

cleaned his own room once a week. What a chore that was ! Sometimes he even had to look after

his little sister and brother.

     Sam had a foreign friend at school. His name was Kumar. Doing chores in Kumar's family was

very different. In the house only the girls did chores. His sisters made all the beds and cleaned all the

rooms too, even his bedroom. His mother always cooked the meals, and his sisters helped her mother.

So when Kumar talked to his friend Sam about chores, he felt very lucky. One day, Sam had an idea.

He asked Kumar,"Could I borrow your sisters?" He wanted them to help him clean his room, but

they refused. Instead, they asked Sam to teach their brother how to do chores, so he could make his

own bed.

     Sam and Kumar are very good at science. They are going to be scientists after university. They

want to make a robot to do the chores. Then everyone-mothers and father, sons and daugters will

be happy!

( )1. A. Sam liked doing chores.

            B. Sam did chores only on the weekend.

            C. Sam really didn't like doing chores.

( )2. A. Sam cleaned his room once a month.

            B. Sam washed the car every weekend.

            C. Sam never looked after his brother and sister. 

( )3. A. Everyone did chores in Kumar's famliy.

            B. Kumar did some chores.

            C. Kumar's sister made his bed. 

( )4. A. Sam wanted to borrow Kumar's sister.

            B. The siste agreed to help Sam.

            C. The sister didn't want Kumar to do chores at home.  

( )5. A. Sam and Kumar plan to make a robot.

            B. They aren't going to be scientists university.

            C. No one will be happy to have a chore robot.

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