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问题 选择题

已知样本75，61，71，76，67，81，61，73，71，77，79，72，65，57，73，73，66，77，69，81，那么这个样本数据落在66.5～71.5内的频率是[ ]

A．0.15       

B．0.2         

C．0.25           

D．0.3

答案

答案：B

填空题
有下列命题：
①双曲线
x2
25
-
y2
9
=1与椭圆
x2
35
+y2=1有相同焦点；
②“-
1
2
＜x＜0”是“2x2-5x-3＜0”必要不充分条件；
③若
a
、
b
共线，则
a
、
b
所在的直线平行；
④若
a
，
b
，
c
三向量两两共面，则
a
、
b
、
c
三向量一定也共面；
⑤∀x∈R，x2-3x+3≠0．
其中是真命题的有：______．（把你认为正确命题的序号都填上）
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阅读理解
阅读理解
       "Reading makes a full man" (Bacon, 1597). Novels written by the writers like Jane Austen, Victor
Hugo and Ernest Hemingway help us to know more about our history, culture and many other things.
Jane Austen was one of the most well-known women writers of the world. She was born in England in
1775. Jane loved reading and writing. She wrote a number of famous novels in her life. Among them,
Pride and Prejudice written in 1779 was the most popular.

Victor Hugo, born in 1802 in France, was one of the best writers in the19th century. The talent in writing
and hard work brought great success to Hugo at an early age. His most popular novel, the Hunchback
of Notre-Dame, was written in 1831. The book was so successful that it was quickly translated into
many other languages across Europe.

Ernest Hemingway, an outstanding American writer and reporter, was born in 1899. His life experience
had a great influence on his writing style. Hemingway lived in France and Italy between the 1920s and
1950s. Most of his books such as The Sun Also Rises were written at that time. He won the Nobel Prize
in 1954 mainly because of the novel The Old Man and the Sea.
1. When was Jane Austen born?
A. In 1775    
B. In 1799  
C. In 1802  
D. In 1899
2. Where was Victor Hugo from?
A. England.  
B. America.    
C. Italy.  
D. France.
3. Ernest Hemingway won the Nobel Prize mainly because of _________.
A. The Hunchback ofNotre-Dame    
B. Pride and Prejudice
C. The Old man and the Sea   
D. The Sun Also Rises
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