问题 单项选择题

统计数据正确地揭示:整个20世纪,全球范围内火山爆发的次数逐年缓慢上升,只有在两次世界大战期间,火山爆发的次数明显下降。科学家同样正确地揭示:整个20世纪,全球火山的活动性处于一个几乎不变的水平上,这和19世纪的情况形成了鲜明的对比。
如果上述断定是真的,则以下哪些项也一定是真的
Ⅰ.如果20世纪不发生两次世界大战,全球范围内火山爆发的次数将无例外地呈逐年缓慢上升的趋势。
Ⅱ.火山自身的活动性,并不是造成火山爆发的唯一原因。
Ⅲ.19世纪全球火山爆发比20世纪要频繁。

A.只有Ⅰ。
B.只有Ⅱ。
C.只有Ⅲ。
D.只有Ⅰ和Ⅱ。
E.Ⅰ、Ⅱ和Ⅲ。

答案

参考答案:B

解析:命题Ⅰ不能选,两次世界大战引起了火山爆发次数的改变,但如果不爆发两次世界大战,火山爆发次数是否改变不能确定,所以Ⅰ不一定为真;火山的活动性水平与火山爆发的频繁性是两个概念,不能混淆,所以Ⅲ不一定真。由于战争对火山爆发次数有影响,所以Ⅱ一定真。

阅读理解

阅读理解。

    During the 1800s, African Americans worked long days in the fields of the American South. They sang

songs that they had brought from Africa while working. One person sang a line. Then a group of workers

repeated it. The song’s words told of the hardships(艰苦) that people suffered. They clapped their hands

and stomped(跺) their feet to the music.

    In the 1860s, the music changed greatly. African American music took new forms. It was also influenced by dance music, which had great rhythm(节奏). Banjos(班卓琴) became popular. A blues singer usually sang a line and then played the banjo in reply. By the early 1900s, the guitar had taken the place of the

banjo in the blues music.

    The blues music has many obvious characteristics. One of them is that the musical notes() are often “

bent”. That is, they are changed slightly to give a song more strength.

    Lyrics are the words of a song. Blues lyrics describe everyday life. The lyrics are often about the relationships between men and women. They tell about sadness and overwork. They tell about finding and losing

love, having money or being poor, being happy or sad and lonely. They almost always use the rhythms of

everyday speech. A group of blues lyrics usually has three lines. The second line repeats the first line. The

third line has different words.

    By the 1940s, large numbers of African Americans moved to Chicago.There, a new kind of "Chicago" blues began. The new music was excellent dance music. Chicago blues led to the birth of a new music

style -rock and roll.

1.This passage is mainly about _________.

A. the blues music                       

B. the life of African Americans

C. the blues lyrics                        

D. the rhythms of different music

2.What information does the passage NOT provide?

A.How the blues music developed as time went by.

B.What the blues lyrics are mostly about.

C.When African Americans moved to the American South.

D.How long the banjo was popular in the blues history.

3.Which of the following is the most likely taken from a blues song?

A.You have to help me. I’ll die if you don’t. You have to help me.

B.You have to help me. You have to help me. I’ll die if you don’t.

C.I’ll die if you don’t help me. You have to help me. You have to help me.

D.I’ll die if you don’t help me. You have to help me. Please help me.

4.What fact does the passage lead you to believe?

A.African Americans sang songs after a long day’s work to relax in the 1800s.

B.The blues singers in the 1860s usually played the guitar while singing songs.

C.It is not difficult to tell the blues music from others from its musical notes.

D.Rock and roll was the most popular blues music in Chicago in the 1950s.

问答题 简答题