问题 选择题

下列反应既属于氧化还原反应,又属于吸热反应的是(  )

A.灼热的碳与CO2的反应

B.Ba(OH)2•8H2O与NH4Cl的反应

C.铁与稀硫酸反应

D.乙烷在氧气中的燃烧反应.

答案

A.反应中C元素的化合价变化,为氧化还原反应,也属于吸热反应,故A选;

B.该反应为吸热反应,但不属于氧化还原反应,故B不选;

C.该反应为放热反应,故C不选;

D.该反应为常见的放热反应,故D不选;

故选A.

单项选择题
阅读理解

 阅读理解(共15小题;每小题2分,满分30分)

阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。

Education for Japanese children is free for the first nine years and all children must go to school for six years of primary schooling and three years of secondary schooling. In the primary and secondary school, about 99.9% of school-age children are present. School usually begins at 8 o’clock in the morning and ends at 3 o’clock in the afternoon on weekdays and at noon on Saturdays. The school year begins in April and ends in March. There is a summer holiday in August and a winter holiday during the New Year season.

After nine years of schooling, students can enter the three-year high school by passing an examination and by paying a small charge each year. After high school, students can go on to study at different kinds of colleges, usually for four years. There are also two-year junior colleges.

小题1: The passage mainly discusses _____________.

A.colleges in Japan

B.free education in Japan

C.education in Japan

D.school time in Japan小题2:If you want to go to high school in Japan, you must ______________________.

A.pay a small amount of money

B.study at primary and secondary school for 9 years

C.take part in the exam and pay a little money

D.pass the exam and pay a little money小题3: What is not mentioned in the passage?

A.Types of colleges.

B.Times for schooling

C.The teaching staff(教职员工)

D.The number of children attending schools小题4:How many days do the Japanese students have to go to school every week?

A.Two days

B.Four and a half days

C.Five days

D.Five and a half days