问题 填空题

如图形象地表示了某化学反应,其中

  表示氢原子,

表示氧原子,该反应的化学方程式为:______,反应类型为______.

答案

从图示可以看出,反应物两个分子是相同的,每个分子都含有两个氧原子和两个氢原子,所以反应物化学式为H2O2,生成物,每两个氢原子和一个氧原子结合成一个水分子,而氧原子两两结合成双原子的分子即O2

观察图示,反应前只有一种分子,反应后有两种分子,即一种物质分解生成两种物质,是分解反应.

故答案为:

2H2O2═2H2O+O2↑;分解反应

阅读理解

Four out of ten parents in the UK spend between £100 and £500 on their children’s birthday parties, according to a survey. Four in ten parents of children under 18, who were questioned in a survey, admitted that they felt pressured into organizing more expensive birthday parties for their children than they would like to.

How much parents spend on their children’s birthday parties is one of the most frequently discussed topics on parenting websites. Here is one comment on Mumsnet summing up the thoughts of many parents: “Where we live everyone hires places, entertainers and so on. I don’t want to compare with my rich neighbors, but I want my son to have what all his classmates have.”

The research was carried out on behalf of the children’s charity, Lumos, set up by the author JK Rowling. Just 13 percent of parents spent £50 or less in the past year on their children’s parties.

Many children’s clowns(小丑) or entertainers charge £150 or more for an hour, and parents often feel it necessary to book a special place. Even without these, the cost of plates, the cake and party bags can mount up. Party Pieces, a company set up by Carole and Michael Middleton, charge about £16 for a birthday cake for a party with 16 guests, £22 for table decorations and up to £48 for party bags.

Many children of famous people have increasingly expensive parties, often seen in famous magazines. Suri Cruise, the daughter of actor Tom Cruise and actress Katie Holmes, enjoyed a £100,000 birthday party according to a report.

Georgette Mulheir of Lumos, said,“Parents in the UK are under increasing pressure to spend more and more money on birthday parties for their children and their children’s friends.”

小题1:What’s the main idea of this passage?

A.Children’s birthday parties put their parents under financial pressure in the UK.

B.Many parents are willing to spend more on their children’s birthday parties.

C.Parents pay more and more attention to their children’s birthday parties.

D.Children in the UK hope for more and more expensive birthday parties.小题2: What does the underlined part “mount up” in Paragraph 4 probably mean?

A.Increase.

B.Change.

C.Exist.

D.Count.小题3:By the example of the birthday party for Suri Cruise, the writer probably wants to show that________.

A.famous people love their children very much

B.children of famous people can get whatever they want

C.some children of famous people have really expensive birthday parties

D.holding expensive birthday parties is common nowadays小题4:In which of the following sections would you most probably read this passage?

A.Business

B.Education

C.Science

D.Family

单项选择题 B1型题