由于从锅炉中排出的灰渣或漏煤的温度一般都600～800℃，由此造成的热损失，称为（）
题型：单项选择题
问题：
由于从锅炉中排出的灰渣或漏煤的温度一般都600～800℃，由此造成的热损失，称为（）热损失。
A、固体不完全燃烧
B、散热
C、灰渣物理
D、气体不完全燃烧
题型：单项选择题
David Moore taught science at the City School．He needed some expensive books，s
o he bought them．He put the books in his car in a quiet street．Then he went to other shops to buy something else．At six he carne back to the car．One door was open—and the books were not there．David drove home．
That night he wrote a letter to a newspaper．The next day he went to the police station．
On Friday people read this in the newspaper：
Books：
Have you any old books? I buy old and modern books．
Open all day on Saturday．Dauid Moore．26 Fry Road．
David stayed at home on Saturday．The first mall came at eight．David took him to the kitchen．At half past nine another man arrived．He had a bag under his arm．
“Mr．Moore?”the man asked．
“That’s right，”David said．“Can I help you?”
“I’ve got some good books．You buy books，don’t you?”
“Yes．Bring them in。Let me have a look．”
Soon the books were on the dining-table．“Come in now．
”David called，“and bring the list．”
A policeman came into the dining-room．He read the names on the books and the names on the list in his hand．They were the same．
“Come with me．Sir．”the policeman said to the man．
小题1:What happened to David Moore one day?
A．He lost his way in the city．
B．He couldn’t find his car．
C．Someone stole his books．
D．Many people read his letter．小题2:The first man to David’s home was a_________．
A．thief
B．policeman
C．driver
D．cook小题3:From the story，we know the second man_______．
A．is one of David’s friends
B．wants to return the books to David
C．wants to show the books to David
D．reads the newspaper小题4:Which of the following shows the right order of what happened to David?
a．He left his car in a quiet street． b．He went to the police station．
c．He wrote a letter to a newspaper． d．He bought some dear books．
e．He bought something else at other shops．
A．d，b，c，a，e
B．d，a，c，e，b
C．d，a，e，b，c
D．c，d，e，a，b小题5:David probably bought the books on________．
A．Wednesday
B．Friday
C．Saturday
D．Sunday