冰和水的质量之比2:1,在各自状态不变的情况下,放出的热量之比为3:2,则冰与水

题型:选择题

问题:

冰和水的质量之比2:1,在各自状态不变的情况下,放出的热量之比为3:2,则冰与水降低的温度之比为(   )

A.1:2

B.1:3

C.3:2

D.3:4

考点:热量的计算
题型:选择题

Guitar lessons
An excellent musician.
Good-at teaching kids for 5 years.
Your home or mine.
Call Larry at 86087593.
Taxi driver wanted
Full time.
Experience and good knowledge of the city are necessary.
Under 45 years old.
Call Mr White at 75132633 or 13935728866.
Lost dog
Medium size, spotted white short hair.
Answer you when you call it David.
Many thanks for returning it.
Call Susan at 87328059.
Flat for sale
Two bedrooms, a kitchen and a bathroom.
Hot water 8:00—18:00.
Beautiful sights out of the windows.
E-mail: sigfund@sohu.com.
小题1:Who can teach children to play the guitar?
A.Mr White. B.David.C.Larry.D.Susan.
小题2:Which number should you call on if you find the lost dog?
A.87328059.B.86087593. C.75132633.D.13935728866.
小题3:Which of the four people may get the job as a taxi driver?
A.A 50-year-old person.
B.A person who can drive and has free time on weekends.
C.A person who has just got his driver's license.
D.A 40-year-old person who can drive well in the city.
小题4:When is hot water provided in the flat according to the ad?
A.In the daytime.B.At night.C.At any time. D.Only in the afternoon.
小题5:How can you contact(联系) the owner of the flat for more information?
A.By making a phone call.B.By sending an e-mail.
C.By going to visit it.D.By sending a letter.
题型:选择题

某人的电子邮件到达时,若他的计算机没有开机,则邮件

A.退回给发件人

B.开机时对方重发

C.该邮件丢失

D.存放在服务商的E-mail服务器

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按使用的传输技术分类,计算机网络可以分成广播式网络和 【7】

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