问题 选择题

在一密闭容器里放入甲、乙、丙、丁四种物质各若干克,使其在一定条件下充分反应后测得数据如下表,则下列表述正确的是……………………………………(       )

四种物质
反应前质量(g)101055
反应后质量(g)16未测40
A.甲可能是反应物

C.该反应可能是置换反应

B.乙可能是催化剂

D.该反应中,丙与丁的质量比为1∶1

答案

答案:B

A、甲在反应后质量增加,一定是生成物,故错误.

B、乙反应后的质量=10+10+5+5-16-4-0=10,物质的质量不变,因此可能是该反应的催化剂,故正确.

C、反应时甲的质量增加是生成物丙丁质量减小是反应物,故反应表达式是丙+丁→甲,是化合反应,故错误.

D、该反应中,丙与丁的质量比=(5-1):(5-0)=4:5,故错误.

故选B

阅读理解

Growing up the daughter of an outstanding educator, Andrea Peterson knew at a young age that she wanted to serve others. It was with this mindset that she started to pursue a degree in medicine. However ,while visiting her brothers who were away at college studying music education, she realized that she too was drawn to teach music.

In her ten years at Granite Falls, she has revitalized the music programs at both the elementary and high school levels,to the extent that an additional music faculty member was hired by the district to assist with the workload. The growth of the music program in Granite Falls School District has encouraged students to participate in county ,state ,and national music competitions ,and won numerous prizes for the district.

Teaching music is only part of Peterson's instruction-it serves as a vehicle to other areas .

"Music is an amazing tool to unlock students' potential. The most visible benefit from their success in music is their increased confidence and self-esteem," Peterson said. "However, I don't believe it is the only benefit, nor the most powerful. It is truly exciting to see how my music teaching can transfer back to other classrooms." With this philosophy, Peterson introduced a cross-curriculum program ,wherein she takes lessons taught in other classes, such as English and math ,and expands upon them in an eight-week unit.

One of the most popular projects in Peterson's classes in the creation and performance of a musical, whereby students create a play from one of the books they have read in another class. Students work together to choose the music that best fits with the overall feel of the play and then perform it for the greater community. "Through Andrea's efforts these kids have helped to put Granite Falls, Washington, on the map for musical talents. Parents, staff ,and community members continue to be in awe of what she is able to bring forth from the children," said Debra Rose Howell, a colleague of Peterson's at Monte Cristo Elementary School.

69.Initially Andrea Peterson Planned to work as a (n)______.

A.teacher B.doctor  C.educator      D.musician

70.The 2nd paragraph mainly tells about______.

A.Andrea Peterson's life at Granite Falls

B.county ,state ,and national music competitions 

C.the growth of the music program in Granite Falls School District

D.Andrea Peterson's contributions to Granite Falls' music programs

71.Which of the following is NOT a benefit the students get from Andrea Peterson's class?

A.music talent development   B.increased self-confidence

C.ability in learning other subjects       D.prizes for English and maths

72.The following sentences tell what the students have to do about their musical project. Which is the right order of the events?

a. They choose proper music for their play

b. They adapt the story into a play.

c. They put on the play for the whole school or the whole community.

d. They practise performing the play.

e. They choose a story they have read in another class.

A.e→b→a→d→c   B.e→b→c→a→d   C.a→e→b→d→c   D.a→b→e→d→c

73.What is most special about the way Andrea Peterson teaches?

A.She has a special way of teaching music.

B.She makes her classes lively and interesting.

C.She combines her music class with other subjects.

D.She comes from a family of professional educators.

74.Which of the following could be the best title for the passage?

A.An Outstanding Teacher     B.Ten years at Granite Falls

C.A Family of Educators          D.Successful Music Projects

问答题 简答题