问题 选择题

下列各物质中能将苯酚溶液、苯甲醇、KSCN、NaOH四种无色液体鉴别出来的是(        )

A.碳酸钠溶液

B.FeCl3溶液

C.酚酞溶液

D.稀盐酸

答案

答案:B

正确答案:B

FeCl3溶液遇到苯酚溶液、苯甲醇、KSCN、NaOH四种无色液体的现象分别是:紫色、无明显现象、血红色、红褐色沉淀。

A.碳酸钠溶液加到四种物质中均无明显现象

B.酚酞溶液只能测出KSCN、NaOH两溶液均显红色

D.稀盐酸,加到四种物质中均无明显现象

阅读理解

阅读理解。

     In elementary school (小学), Guadalupe Quintanilla was often referred to (认为)as a "slow learner" by her

teachers. But she really wasn't slow at all. She just didn't understand the language used in the classroom. Her

problem was that she didn't speak English. So she left school after the fourth grade.

     When Guadalupe grew up, married (结婚), and had children of her own, she knew that her children were

clever. But some of their teachers didn't think so. The children were having trouble in school because they

didn't speak English. Mrs Quintanilla was angry. She didn't want people to think that her children were slow

learners. So she decided to learn English herself as a way of helping them. She practised English. She looked

up words in the dictionary. She asked the school headmaster to let her sit in on classes. It wasn't easy, but

she passed all her exams. She said that many of the other students helped her.

     Mrs Quintanilla has helped her children with their lessons. Her two sons have won success (成功). One is

a teacher, and the other is a doctor. Her youngest child, a daughter, is studying in a university (大学).

1. Guadalupe was called as low learner _____.

A. to make her study harder

B. because she wasn't clever

C. because she stayed at home

D. because she didn't speak English

2. According to (根据) the story, children who don't speak English _____.

A. may have more trouble in school

B. have trouble playing football

C. often write a diary

D. grow up to be teachers

3. Which happened first?

A. Guadalupe passed all her exams.

B. Guadalupe left school after the fourth grade.

C. Guadalupe had three children.

D. Her two sons won success.

4. The story is mainly (主要的) about _____.

A. learning to sing and dance

B. the problem of slow learning

C. going to a university

D. Mrs. Quintanilla's success

问答题 简答题