题目内容
“Welcome to Senior High School．”（欢迎进入高中），在这段句子的所有英文字母中，字母O出现的频率是 ．
【答案】分析：数出这个句子中所有字母的个数和字母“o”出现的频数，由频率=频数÷总个数计算．
解答：解：在“Welcomc to Senior High School．”这个句子中：有25个字母，其中有5个“o”，故字母“o”出现的频率为 5÷25=0.2．
故答案为：0.2．
点评：本题考查频率、频数的关系：频率=
．
解答：解：在“Welcomc to Senior High School．”这个句子中：有25个字母，其中有5个“o”，故字母“o”出现的频率为 5÷25=0.2．
故答案为：0.2．
点评：本题考查频率、频数的关系：频率=
． 
练习册系列答案
相关题目
A young woman carrying a three-year-old child got on a bus. The conductor hurried to give her a warm welcome and then kindly asked the other passengers to make more room for the woman and her child. On seeing this, people began to talk. "You know this conductor used to be very rude. Now suddenly he has changed his bad behavior, "said a middle-aged man.
"Yes, he should be praised and we must write a letter to the company," said a second passenger. "That's right," another lady said, "I wish a newspaper reporter were here so that more people could learn from this conductor.”
Just then a gentleman who looked like a teacher turned to the conductor and said, "Excuse me, but can I know your name, please? Your excellent service must be praised..."
Before he could open his mouth, the three-year-old child sitting on the young woman's lap interrupted, "I know his name. I call him Dad."
【小题1】
One passenger suggested writing a letter to the company to ______ .
【小题2】
What was the gentleman?
【小题3】
. The word "he" in the last paragraph refers to _______.
【小题4】
It is clear from the story that the conductor _______.
"Yes, he should be praised and we must write a letter to the company," said a second passenger. "That's right," another lady said, "I wish a newspaper reporter were here so that more people could learn from this conductor.”
Just then a gentleman who looked like a teacher turned to the conductor and said, "Excuse me, but can I know your name, please? Your excellent service must be praised..."
Before he could open his mouth, the three-year-old child sitting on the young woman's lap interrupted, "I know his name. I call him Dad."
【小题1】
One passenger suggested writing a letter to the company to ______ .
| A．make a demand for more buses | B． thank the conductor for his good service |
| C．criticize the conductor for his rude behavior | |
| D．invite a newspaper reporter to write about the conductor |
What was the gentleman?
| A．A teacher. | B．A newspaper reporter. |
| C．Not known from the story. | D．The conductor's friend from his company. |
. The word "he" in the last paragraph refers to _______.
| A．the gentleman | B．the conductor |
| C．the middle-aged man | D．the three-year-old child |
It is clear from the story that the conductor _______.
| A．has changed his attitude towards his work |
| B．has now been kind and polite to all passengers |
| C．has not changed his rude behavior to passengers |
| D．has now been kind and polite to women with children |