问题 选择题

下列有关实验现象的描述不正确的是(  )

A.羊毛在酒精灯的火焰上灼烧后会产生烧焦羽毛味

B.纯净的一氧化碳在空气中点燃产生蓝色火焰

C.铁丝在氧气中燃烧时火星四射,放出大量的热,同时生成黑色固体

D.铁丝放入稀盐酸中,有气泡产生,溶液逐渐变蓝色

答案

A、羊毛的主要成分是蛋白质,燃烧时,有烧焦羽毛的气味,所以正确.

B、纯净的一氧化碳在空气中燃烧的现象是:产生蓝色火焰,放出大量的热,生成能使澄清石灰水变浑的气体,所以正确.

C、铁丝在氧气中燃烧的现象是:剧烈燃烧,火星四射,放出大量的热,同时生成黑色固体,所以正确.

D、铁与稀盐酸反应生成氯化亚铁和氢气,氯化亚铁溶液呈浅绿色,现象是:有气泡产生,溶液逐渐变浅绿色,所以错误.

故选D.

阅读理解

I love My Country is a Dutch(荷兰的)TV series, first aired(播放)in the Netherlands on March 8, 2008.A tenth season was aired in late 2012, with an 11th season airing in March, 2013.

The show was created by the Dutchman John de Mol and has been sold to at least 25 countries in the world.

The series is divided into two teams. Each team, led by its leader, has three members. The teams have to answer questions about their own home country, like "What is the capital…?", "When did our country end the war with…?”etc. At the end of the programme the winning team gets a bicycle.

Big Ideas is a Canadian television series produced by TVOntario, on the air since 2001. The idea of starting the programme came from Wodek Szemberg who worked as the producer of the programme afterwards. The programme show lectures(讲座)to the public given by famous university educators.

Big Ideas airs on TV Ontario on Saturdays and Sundays at 5 pm, with repeat airings at 5 am on Sunday and Monday mornings.

In 2007, Big Ideas held its Best Lecture Competition for the second time. Dr. Michael Persinger, from Laurentian University, received the best-lecturer award.

The show stopped in the spring of 2013 because TVO had little money for it.

小题1:How many seasons of I Love My Country has been aired so far?

A.8

B.9

C.10

D.11小题2:When can you see Big Ideas on TV?

A.At 4 pm on Saturdays.

B.At 5 pm on Sundays.

C.At 5 pm on Mondays.

D.At 4 am on Sundays.小题3:The writer writes the passage to _______.

A.introduce two TV series to us

B.explain why there are so many TV series

C.encourage us to watch more TV series

D.encourage us to love our country more

问答题 简答题